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111-561: The Harz-Heide Road is a road that runs over the Harz mountains in Germany through heath (German: Heide ) landscape and which is known for its scenery. It runs from Göttingen along the B 27 and B 446 federal highways to Duderstadt and Herzberg . From there it continues on the B 27 to Bad Lauterberg and Braunlage . It then follows the B 4 through Bad Harzburg , Vienenburg , Wolfenbüttel , Braunschweig , Gifhorn and Uelzen to

222-484: A gigawatt each. They generate about a third of the world's electricity , but cause many illnesses and the most early deaths per unit of energy produced, mainly from air pollution . World installed capacity doubled from 2000 to 2023 and increased 2% in 2023. A coal-fired power station is a type of fossil fuel power station . The coal is usually pulverized and then burned in a pulverized coal-fired boiler . The furnace heat converts boiler water to steam , which

333-545: A magnet . Central power stations became economically practical with the development of alternating current (AC) power transmission, using power transformers to transmit power at high voltage and with low loss. Commercial electricity production started with the coupling of the dynamo to the hydraulic turbine. The mechanical production of electric power began the Second Industrial Revolution and made possible several inventions using electricity, with

444-422: A breeding pair has settled in the eastern Harz as the result of a wildlife reintroduction project. The ring ouzel prefers semi-open stone runs and lightly wooded transition zones between treeless raised bogs and forests . The Harz is home to one of its few, isolated breeding areas in central Europe. Its main distribution area extends across northwest Europe, including large parts of England and Scotland, as well as

555-687: A consequence of the mining industry in the Upper Harz, was largely destroyed by a bark beetle outbreak and a storm of hurricane proportions in November 1800. This largest known bark beetle infestation in the Harz was known as the Große Wurmtrocknis , and destroyed about 30,000 hectares (74,000 acres) of spruce forest and lasted about for 20 years. The woods were largely reforested with spruce. Continuous problems with bark beetle and storms were

666-565: A consequence of this it is also referred to as the "Classic Geological Square Mile" ( Klassischen Quadratmeile der Geologie ). There is a room devoted to geology in the Harz Museum in Wernigerode. The vegetation of the Harz mountains is divided into six altitudinal zones : From the edge of the Harz to 700 m above sea level beech woods dominate, especially the wood-rush beech woods on locations poorly supplied with nutrients where

777-451: A generator are photovoltaic solar and fuel cells . Almost all commercial electrical power on Earth is generated with a turbine , driven by wind, water, steam or burning gas. The turbine drives a generator, thus transforming its mechanical energy into electrical energy by electromagnetic induction. There are many different methods of developing mechanical energy, including heat engines , hydro, wind and tidal power. Most electric generation

888-645: A generator to rotate. Electrochemistry is the direct transformation of chemical energy into electricity, as in a battery . Electrochemical electricity generation is important in portable and mobile applications. Currently, most electrochemical power comes from batteries. Primary cells , such as the common zinc–carbon batteries , act as power sources directly, but secondary cells (i.e. rechargeable batteries) are used for storage systems rather than primary generation systems. Open electrochemical systems, known as fuel cells , can be used to extract power either from natural fuels or from synthesized fuels. Osmotic power

999-408: A huge amount of power from a single unit. However, nuclear disasters have raised concerns over the safety of nuclear power, and the capital cost of nuclear plants is very high. Hydroelectric power plants are located in areas where the potential energy from falling water can be harnessed for moving turbines and the generation of power. It may not be an economically viable single source of production where

1110-482: A keen interest in science (see Goethes: Wahrheit und Dichtung ). In 1777, Goethe climbed the Brocken, departing from Torfhaus. At that time, there was still no mass tourism on the Brocken; in the year 1779 only 421 walkers were recorded. Goethe described his feelings on the summit later, as follows: So lonely, I say to myself, while looking down at this peak, will it feel to the person, who only wants to open his soul to

1221-473: A lack of old trees and natural brooks). Through improvements to its habitat, including the renaturalisation of waterways and the creation of relatively undisturbed peaceful areas, the black stork population has now recovered. A typical mammal of such deciduous woods is the European wildcat ( Felis silvestris ), that has established a stable population in the Harz. It prefers the diverse wooded areas, which offer

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1332-542: A large number of consumers. Most power plants used in centralised generation are thermal power plants meaning that they use a fuel to heat steam to produce a pressurised gas which in turn spins a turbine and generates electricity. This is the traditional way of producing energy. This process relies on several forms of technology to produce widespread electricity, these being natural coal, gas and nuclear forms of thermal generation. More recently solar and wind have become large scale. A photovoltaic power station , also known as

1443-554: A line from Ilsenburg to Bad Lauterberg , which roughly separates the catchment areas for the Weser (Upper Harz) and Elbe (Lower Harz). Only on the southeastern perimeter of the Upper Harz, which is also called the High Harz ( Hochharz ) (Goslar, Göttingen and Harz districts), does the mountain range exceed 1,000 m above NN on the Brocken massif. Its highest peak is the Brocken (1,141 m), its subsidiary peaks are

1554-536: A prime source of power within isolated villages. Total world generation in 2021 was 28,003 TWh, including coal (36%), gas (23%), hydro (15%), nuclear (10%), wind (6.6%), solar (3.7%), oil and other fossil fuels (3.1%), biomass (2.4%) and geothermal and other renewables (0.33%). China produced a third of the world's electricity in 2021, largely from coal. The United States produces half as much as China but uses far more natural gas and nuclear. Variations between countries generating electrical power affect concerns about

1665-466: A result of deliberate forest management . Sycamore trees are also found in these woods. Spruce woods thrive in the highest locations from about 800 m to the tree line at around 1,000 m above sea level. These woods are also home to some deciduous trees such as rowan, silver and downy birches ( Betula pendula and Betula pubescens ) and willows ( Salix spec. ). Conditions of high humidity foster an environment rich in mosses and lichens . In spite of

1776-416: A result of the increasingly continental climate on the eastern edge of the Harz, the common beech gives way to mixed forests of sessile oak. At intermediate heights of between 700 and 800 m above sea level, mixed woods of spruce ( Picea abies ) and common beech would predominantly be found under natural conditions. However, apart from a few remnants, these were supplanted a long time ago by spruce stands as

1887-419: A rich variety of food. The animal kingdom of the mixed beech and spruce woods is also diverse. Species that thrive in mixed forest are especially at home. For example, the mixed mountain forest is the natural habitat of the capercaillie ( Tetrao urogallus ). The Tengmalm's owl ( Aegolius funereus ) may also be found here. It breeds almost exclusively in black woodpecker holes in old beeches, and needs, unlike

1998-406: A role. Melic grass beech woods are found in the few places where there is an abundance of nutrients and bases , e. g. over dolerite and gneiss formations, and they have a vegetation layer rich in variety and luxuriant growth. Here, too, the common beech dominates, mixed, for example, with sycamore, ash ( Fraxinus excelsior ), hornbeam ( Carpinus betulus ) and Scots elm ( Ulmus glabra ). As

2109-441: A scale of at least 1 MW p . As of 2018, the world's largest operating photovoltaic power stations surpassed 1 gigawatt . At the end of 2019, about 9,000 solar farms were larger than 4 MW AC (utility scale), with a combined capacity of over 220 GW AC . A wind farm or wind park, or wind power plant, is a group of wind turbines in the same location used to produce electricity . Wind farms vary in size from

2220-544: A small number of turbines to several hundred wind turbines covering an extensive area. Wind farms can be either onshore or offshore . Many of the largest operational onshore wind farms are located in China, India, and the United States. For example, the largest wind farm in the world , Gansu Wind Farm in China had a capacity of over 6,000  MW by 2012, with a goal of 20,000 MW by 2020. As of December 2020,

2331-465: A solar park, solar farm, or solar power plant, is a large-scale grid-connected photovoltaic power system (PV system) designed for the supply of merchant power . They are different from most building-mounted and other decentralized solar power because they supply power at the utility level, rather than to a local user or users. Utility-scale solar is sometimes used to describe this type of project. This approach differs from concentrated solar power ,

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2442-407: A type of damselfly , can be seen by streams in the Harz. The dipper ( Cinclus cinclus ), which is found everywhere on Harz streams, occurs almost exclusively in the highlands. Its habitat is very fast-flowing, clear mountain streams with wooded banks. It can dive and run under water along the stream bed. It turns stones over in its search for food. The grey wagtail ( Motacilla cinerea ) also uses

2553-626: Is a native of the bilberry-rich bog spruce woods. Only a few animals are able to survive the extreme conditions of the raised bogs . Examples of these are the Alpine emerald dragonfly ( Somatochlora alpestris ), which only occurs in Lower Saxony in the Harz, and is endangered in Germany, and the Subarctic darner ( Aeshna subarctica ), a damselfly which is threatened with extinction. Rocks and stone runs are important habitat components for

2664-462: Is a possibility at places where salt and fresh water merge. The photovoltaic effect is the transformation of light into electrical energy, as in solar cells . Photovoltaic panels convert sunlight directly to DC electricity. Power inverters can then convert that to AC electricity if needed. Although sunlight is free and abundant, solar power electricity is still usually more expensive to produce than large-scale mechanically generated power due to

2775-468: Is based upon the local power requirement and the fluctuations in demand. All power grids have varying loads on them. The daily minimum is the base load , often supplied by plants which run continuously. Nuclear, coal, oil, gas and some hydro plants can supply base load. If well construction costs for natural gas are below $ 10 per MWh, generating electricity from natural gas is cheaper than generating power by burning coal. Nuclear power plants can produce

2886-612: Is carried out in power stations , also called "power plants". Electricity is most often generated at a power plant by electromechanical generators , primarily driven by heat engines fueled by combustion or nuclear fission , but also by other means such as the kinetic energy of flowing water and wind. Other energy sources include solar photovoltaics and geothermal power . There are exotic and speculative methods to recover energy, such as proposed fusion reactor designs which aim to directly extract energy from intense magnetic fields generated by fast-moving charged particles generated by

2997-487: Is characterised by regular precipitation throughout the year. Exposed to westerly winds from the Atlantic, heavy with rain, the windward side of the mountains has up to 1,600 mm of rain annually (West Harz, Upper Harz, High Harz); in contrast, the leeward side only receives an average of 600 mm of precipitation per annum (East Harz, Lower Harz, Eastern Harz foothills). The Harz is the most geologically diverse of

3108-600: Is divided into the Upper Harz ( Oberharz ) in the northwest, which is up to 800 m high, apart from the 1,100 m high Brocken massif, and the Lower Harz ( Unterharz ) in the east which is up to around 400 m high and whose plateaus are capable of supporting arable farming. The following districts ( Kreise ) fall wholly or partly within the Harz: Goslar and Göttingen in the west, Harz and Mansfeld-Südharz in

3219-975: Is driven by heat engines. The combustion of fossil fuels supplies most of the energy to these engines, with a significant fraction from nuclear fission and some from renewable sources . The modern steam turbine , invented by Sir Charles Parsons in 1884, currently generates about 80% of the electric power in the world using a variety of heat sources. Turbine types include: Turbines can also use other heat-transfer liquids than steam. Supercritical carbon dioxide based cycles can provide higher conversion efficiency due to faster heat exchange, higher energy density and simpler power cycle infrastructure. Supercritical carbon dioxide blends , that are currently in development, can further increase efficiency by optimizing its critical pressure and temperature points. Although turbines are most common in commercial power generation, smaller generators can be powered by gasoline or diesel engines . These may used for backup generation or as

3330-511: Is fundamentally the opposite of distributed generation . Distributed generation is the small-scale generation of electricity to smaller groups of consumers. This can also include independently producing electricity by either solar or wind power. In recent years distributed generation as has seen a spark in popularity due to its propensity to use renewable energy generation methods such as rooftop solar . Centralised energy sources are large power plants that produce huge amounts of electricity to

3441-577: Is provided by batteries. Other forms of electricity generation used in niche applications include the triboelectric effect , the piezoelectric effect , the thermoelectric effect , and betavoltaics . Electric generators transform kinetic energy into electricity. This is the most used form for generating electricity based on Faraday's law . It can be seen experimentally by rotating a magnet within closed loops of conducting material, e.g. copper wire. Almost all commercial electrical generation uses electromagnetic induction, in which mechanical energy forces

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3552-472: Is rated in megawatt-peak (MW p ), which refers to the solar array's theoretical maximum DC power output. In other countries, the manufacturer states the surface and the efficiency. However, Canada, Japan, Spain, and the United States often specify using the converted lower nominal power output in MW AC , a measure more directly comparable to other forms of power generation. Most solar parks are developed at

3663-435: Is the process of generating electric power from sources of primary energy . For utilities in the electric power industry , it is the stage prior to its delivery ( transmission , distribution , etc.) to end users or its storage , using for example, the pumped-storage method. Consumable electricity is not freely available in nature, so it must be "produced", transforming other forms of energy to electricity. Production

3774-429: Is then used to spin turbines that turn generators . Thus chemical energy stored in coal is converted successively into thermal energy , mechanical energy and, finally, electrical energy . Natural gas is ignited to create pressurised gas which is used to spin turbines to generate electricity. Natural gas plants use a gas turbine where natural gas is added along with oxygen which in turn combusts and expands through

3885-876: The Roßtrappe , could indicate an earlier Celtic occupation of the Harz. The Harzgau itself was first mentioned in a deed by the Emperor, Louis the Pious , from the year 814, in which it was referred to by its High German form, Hartingowe . According to the Fulda annals of 852, the Harzgau was occupied by the Harudes and after whom the Harudengau ( Harudorum pagus ) was named. Harud , from which Hard , Hart and Harz are derived, means forest or forested mountains, and

3996-678: The Fichtel Mountains and Rhenish Massif . They were, however, heavily eroded due to their height (up to 4 km) and were later covered over by Mesozoic rocks. From the Early Cretaceous and into Late Cretaceous times the Harz was uplifted in a single block by tectonic movements and, particularly during the Tertiary period, the younger overlying strata were eroded and the underlying base rock left standing as low mountains. The most important uplift movements were during

4107-841: The Heinrichshöhe (1,044 m) to the southeast and the Königsberg (1,023 m) to the southwest. Other prominent hills in the Harz are the Acker- Bruchberg ridge (927 m), the Achtermannshöhe (925 m) and the Wurmberg (971 m) near Braunlage . In the far east, the mountains merge into the East Harz foothills (Harz district, Saxony-Anhalt), which are dominated by the Selke Valley. Part of

4218-674: The Inner German border ran through the Harz, the west belonging to the Federal Republic of Germany (West Germany) and the east to the German Democratic Republic (East Germany). Today the Harz forms a popular tourist destination for summer hiking as well as winter sports. About 700,000 to 350,000 years ago Homo erectus hunted in and around the Harz near Bilzingsleben (Thuringia), Hildesheim and Schöningen (Lower Saxony). The Neanderthals entered

4329-676: The Three Mile Island accident , Chernobyl disaster and the Fukushima nuclear disaster illustrate this problem. The table lists 45 countries with their total electricity capacities. The data is from 2022. According to the Energy Information Administration , the total global electricity capacity in 2022 was nearly 8.9 terawatt (TW), more than four times the total global electricity capacity in 1981. The global average per-capita electricity capacity

4440-588: The Wolkenhäuschen ("Little House in the Clouds") on the Brocken. As a young man, the famous German poet, Goethe visited the Harz several times and had a number of important lifetime experiences. These included his walks on the Brocken and his visit to the mines in Rammelsberg. Later, his observations of the rocks on the Brocken led to his geological research. His first visit to the Harz awakened in him

4551-528: The common beech ( Fagus sylvatica ) is often the only tree species. In lower, drier locations the English oak ( Quercus robur ) and sessile oak ( Quercus petraea ) occur as well. Sycamore trees ( Acer pseudoplatanus ) may be found growing in wetter places. During times of decay and rejuvenation when there is plenty of light, light-dependent pioneers such as rowan ( Sorbus aucuparia ), silver birch ( Betula pendula ) and pussy willow ( Salix caprea ) play

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4662-559: The limestone deposits around Elbingerode and the Gabbro of Bad Harzburg . The landscapes of the Harz are characterised by steep mountain ridges, stone runs , relatively flat plateaus with many raised bogs and long, narrow V-shaped valleys , of which the Bode Gorge , the Oker and Selke valleys are the best known. A representative cross-section of all the Harz rocks is displayed on

4773-434: The peregrine falcon ( Falco peregrinus ) and ring ouzel ( Turdus torquatus ). The peregrine, which is threatened with extinction here, needs steep rock outcrops with little vegetation. After its population had died out in the Harz, a breeding pair was re-established in the region. A crucial contribution has been made by extensive efforts to promote quiet areas in the ancestral breeding grounds of this shy species. Since 1980,

4884-487: The pygmy owl ( Glaucidium passerinum ) which is threatened with extinction and which lives in the submontane to subalpine zones within mixed and pine forests interspersed with open areas. They prefer spruce woods for breeding, but feed in more open stands of trees or on open moorland. Like the black stork , the pygmy owl had long since disappeared from the Harz, but returned in the 1980s of its own volition, as its ancestral homeland once again became more natural, so that there

4995-429: The steam turbine had a massive impact on the efficiency of electrical generation but also the economics of generation as well. This conversion of heat energy into mechanical work was similar to that of steam engines , however at a significantly larger scale and far more productively. The improvements of these large-scale generation plants were critical to the process of centralised generation as they would become vital to

5106-499: The 1218 MW Hornsea Wind Farm in the UK is the largest offshore wind farm in the world . Individual wind turbine designs continue to increase in power , resulting in fewer turbines being needed for the same total output. A coal-fired power station or coal power plant is a thermal power station which burns coal to generate electricity . Worldwide there are about 2,500 coal-fired power stations, on average capable of generating

5217-481: The 1880s the popularity of electricity grew massively with the introduction of the Incandescent light bulb . Although there are 22 recognised inventors of the light bulb prior to Joseph Swan and Thomas Edison , Edison and Swan's invention became by far the most successful and popular of all. During the early years of the 19th century, massive jumps in electrical sciences were made. And by the later 19th century

5328-894: The Bode. The Wipper is fed by the Eine . The Rhume is joined by the Söse and the Oder; the latter being fed by the Sieber . The Zorge , the Wieda and the Uffe all flow into the Helme. → See List of hills in the Harz → See List of rock formations (crags, tors, etc.) in the Harz Climatically a hill range has lower temperatures and higher levels of precipitation than the surrounding land. The Harz

5439-491: The Brocken without special permission, and the lighting of fires was forbidden. The first attempts at forest conservation in the Harz were centred on the Brocken, and began with a far-sighted nature conservation act over 275 years ago. In 1718, Count Christian Ernest of the House of Stolberg issued an ordinance in which destruction or damage to the forest on the Brocken would be severely punished. In 1736, Christian Ernest also built

5550-581: The German Mittelgebirge , although it is overwhelmingly dominated by base-poor rocks. The most common rocks lying on the surface are argillaceous shales , slaty ( geschieferte ) greywackes and granite intrusions in the shape of two large igneous rock masses or plutons . The Gießen-Harz surface layer of the Rhenohercynian zone , which is widespread in the Harz, consists mainly of flysch . Well-known and economically important are

5661-648: The Harudes were the residents or dwellers in the Harud. Of more recent origin are settlements whose names end in –rode , a suffix that is first discernable in the Harzgau from the mid-9th century. Where the founders of these villages came from is unknown. Charlemagne declared the Harz a restricted imperial forest or Reichsbannwald . The Saxon Mirror ( Sachsenspiegel ), the oldest German law book ( Rechtsbuch ), probably published around 1220/30 at Falkenstein Castle in

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5772-1047: The Harz The largest rivers in the Harz are the Innerste , the Oker and the Bode in the north; the Wipper in the east; and the Oder in the south. The Innerste merges into the Leine and its tributaries are the Nette and the Grane . The rivers Radau , Ecker and Ilse all discharge into the Oker. The Hassel , the Selke and the Holtemme (whose main tributary is the Zillierbach ) flow into

5883-409: The Harz are some of the best preserved in central Europe. They were formed at the end of the last ice age about 10,000 years ago. A significant proportion of the vegetation on these raised bogs is made up of peat mosses ( Sphagnum spec. ). The flarks ( Schlenken ) and the hummocks ( Bulten ) are home to different species of flora. In the flarks, for example, Sphagnum cuspidatum is found, whereas

5994-463: The Harz point to the use of this prehistoric adhesive by Neanderthals about 50,000 years ago. The Upper Palaeolithic Revolution , about 40,000 years ago, saw Homo sapiens move from Africa into Europe, including to the Harz region, where they appear to have ousted the Neanderthals and subsequently settled here. Many discoveries in the Harz, such as the bronze club of Thale, which was found by

6105-762: The Jordanshöhe near Sankt Andreasberg near the car park (see photo). The formation and geological folding of the Harz hills began during a prominent phase of the Palaeozoic era, in the course of the Hercynian mountain building of the Carboniferous period , about 350 to 250 million years ago. At that time in the history of the Earth , numerous high mountains appeared in Western Europe, including

6216-580: The Northern America in the 1920s in large cities and urban areas. It was not until the 1930s that rural areas saw the large-scale establishment of electrification. 2021 world electricity generation by source. Total generation was 28 petawatt-hours . Several fundamental methods exist to convert other forms of energy into electrical energy. Utility-scale generation is achieved by rotating electric generators or by photovoltaic systems. A small proportion of electric power distributed by utilities

6327-533: The Selke valley, later made the imperial restriction clear: "Whoever rides through the Harz Forest, must unstring his bow and crossbow and keep dogs on a line – only crowned royalty ( gekrönte Häupter ) are allowed to hunt here". Eike von Repkow's Sachsenspiegel which, for centuries, formed the basis on which German law was administered, described the Harz as a place where wild animals are guaranteed protection in

6438-597: The United States, fossil fuel combustion for electric power generation is responsible for 65% of all emissions of sulfur dioxide , the main component of acid rain. Electricity generation is the fourth highest combined source of NO x , carbon monoxide , and particulate matter in the US. According to the International Energy Agency (IEA), low-carbon electricity generation needs to account for 85% of global electrical output by 2040 in order to ward off

6549-508: The ability to store the flow of water is limited and the load varies too much during the annual production cycle. Electric generators were known in simple forms from the discovery of electromagnetic induction in the 1830s. In general, some form of prime mover such as an engine or the turbines described above, drives a rotating magnetic field past stationary coils of wire thereby turning mechanical energy into electricity. The only commercial scale forms of electricity production that do not employ

6660-411: The advancement of electrical technology and engineering led to electricity being part of everyday life. With the introduction of many electrical inventions and their implementation into everyday life, the demand for electricity within homes grew dramatically. With this increase in demand, the potential for profit was seen by many entrepreneurs who began investing into electrical systems to eventually create

6771-546: The animals in these streams need to be well suited to high velocities. Only a few species, such as fish, swim actively against the stream. The most common species are brown trout ( Salmon trutta forma fario ) and bullhead ( Cottus gobio ). Much richer in variety, by contrast, is the range of species in the system of crevices under the streambed. In addition to the insects and fish hatchlings that thrive here, may be found protozoons , flatworms ( Turbellaria ) and water mites ( Hygrobatoidea ). Other species of animals cling fast to

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6882-487: The atmosphere. Nuclear power plants can also create district heating and desalination projects, limiting carbon emissions and the need for expanded electrical output. A fundamental issue regarding centralised generation and the current electrical generation methods in use today is the significant negative environmental effects that many of the generation processes have. Processes such as coal and gas not only release carbon dioxide as they combust, but their extraction from

6993-430: The beech woods, with their abundance of dead wood, are the black woodpecker ( Dryocopus martius ) and stock dove ( Columba oenas ). An indication of the natural state of the beech woods in the Harz is the return of the black stork ( Ciconia nigra ). This shy and susceptible resident of richly diverse deciduous and mixed forest has become very rare in central Europe due to increasing disturbance of its habitat (caused by

7104-486: The common beech gives way to hardier deciduous species such as sycamore, large-leaved lime ( Tilia platyphyllos ), Scots elm or ash. The herbaceous layer is similar to that of the better-nourished beech woods. Notable species amongst the plant communities here include the Alpine blue-sow-thistle ( Cicerbita alpina ), perennial honesty ( Lunaria rediviva ), hard shield fern ( Polystichum aculeatum ) and long beech fern ( Phegopteris connectilis ). The raised bogs in

7215-616: The cost of the panels. Low-efficiency silicon solar cells have been decreasing in cost and multijunction cells with close to 30% conversion efficiency are now commercially available. Over 40% efficiency has been demonstrated in experimental systems. Until recently, photovoltaics were most commonly used in remote sites where there is no access to a commercial power grid, or as a supplemental electricity source for individual homes and businesses. Recent advances in manufacturing efficiency and photovoltaic technology, combined with subsidies driven by environmental concerns, have dramatically accelerated

7326-463: The dams are primarily used to generate electricity , to provide drinking water , to prevent flooding and to supply water in times of scarcity. Modern dam-building began in the Harz with the construction of the Söse Valley Dam , which was built between 1928 and 1931. The dams of the Upper Harz lakes are some of the oldest dams in Germany that are still in operation. → See List of dams in

7437-517: The deployment of solar panels. Installed capacity is growing by around 20% per year led by increases in Germany, Japan, United States, China, and India. The selection of electricity production modes and their economic viability varies in accordance with demand and region. The economics vary considerably around the world, resulting in widespread residential selling prices. Hydroelectric plants , nuclear power plants , thermal power plants and renewable sources have their own pros and cons, and selection

7548-430: The drier hummocks and occasionally the cross-leaved heath ( Erica tetralix ) may be found. Typical grasses are the sheathed cottongrass ( Eriophorum vaginatum ), known for its bright, white clusters of fruit and deergrass ( Scirpus cespitosus ), which is rust-red in the autumn. One fascinating moorland plant is the round-leaved sundew ( Drosera rotundifolia ). Bog or northern bilberry (Vaccinium uliginosum) grows on

7659-491: The drier margins of the bog. A multitude of wild animals live in the beech forests of the Harz Mountains. Over 5,000 species, most of them insects, have their home in these woods. They include many species that help to decompose leaves and work them into the soil and ground cover, including springtails , oribatid mites , woodlice , roundworms , millipedes , earthworms and snails . Characteristic breeding birds in

7770-505: The earlier, serious destruction of the cave's features by Vandals . The first Harz 'rangers' were formed. In 1705, the last bear was killed in the Harz, on the Brocken. The steadily increasing consumption of wood by the pits and smelting works led to overexploitation of the forests and, from about 1700, to their outright destruction. There were no less than 30,000 charcoal piles in the Harz. In 1707, an order by Count Ernst of Stolberg forbade Brocken guides to take strangers or local folk to

7881-533: The electricity through high voltage transmission lines to a substation, where it is then distributed to consumers; the basic concept being that multi-megawatt or gigawatt scale large stations create electricity for a large number of people. The vast majority of electricity used is created from centralised generation. Most centralised power generation comes from large power plants run by fossil fuels such as coal or natural gas, though nuclear or large hydroelectricity plants are also commonly used. Centralised generation

7992-524: The entire power system that we now use today. Throughout the middle of the 20th century many utilities began merging their distribution networks due to economic and efficiency benefits. Along with the invention of long-distance power transmission , the coordination of power plants began to form. This system was then secured by regional system operators to ensure stability and reliability. The electrification of homes began in Northern Europe and in

8103-404: The environment. In France only 10% of electricity is generated from fossil fuels , the US is higher at 70% and China is at 80%. The cleanliness of electricity depends on its source. Methane leaks (from natural gas to fuel gas-fired power plants) and carbon dioxide emissions from fossil fuel-based electricity generation account for a significant portion of world greenhouse gas emissions . In

8214-428: The first electricity public utilities. This process in history is often described as electrification. The earliest distribution of electricity came from companies operating independently of one another. A consumer would purchase electricity from a producer, and the producer would distribute it through their own power grid. As technology improved so did the productivity and efficiency of its generation. Inventions such as

8325-495: The fusion reaction (see magnetohydrodynamics ). Phasing out coal-fired power stations and eventually gas-fired power stations , or, if practical, capturing their greenhouse gas emissions , is an important part of the energy transformation required to limit climate change . Vastly more solar power and wind power is forecast to be required, with electricity demand increasing strongly with further electrification of transport , homes and industry. However, in 2023, it

8436-420: The generators. Although there are several types of nuclear reactors, all fundamentally use this process. Normal emissions due to nuclear power plants are primarily waste heat and radioactive spent fuel. In a reactor accident, significant amounts of radioisotopes can be released to the environment, posing a long term hazard to life. This hazard has been a continuing concern of environmentalists. Accidents such as

8547-494: The ground also impacts the environment. Open pit coal mines use large areas of land to extract coal and limit the potential for productive land use after the excavation. Natural gas extraction releases large amounts of methane into the atmosphere when extracted from the ground greatly increase global greenhouse gases. Although nuclear power plants do not release carbon dioxide through electricity generation, there are risks associated with nuclear waste and safety concerns associated with

8658-458: The heat input is from the process of nuclear fission . Currently, nuclear power produces 11% of all electricity in the world. Most nuclear reactors use uranium as a source of fuel. In a process called nuclear fission , energy, in the form of heat, is released when nuclear atoms are split. Electricity is created through the use of a nuclear reactor where heat produced by nuclear fission is used to produce steam which in turn spins turbines and powers

8769-401: The high mountains of southern and eastern Europe. The waterways, with their distinct mountain stream character, play an important role right across the Harz. In comparison with the other natural regions of Lower Saxony, they are still very natural and varied, and the water is very clean. As a result of the high water velocity of the Harz streams, flowers rarely gain a foothold in the water. Even

8880-476: The higher regions are, as in most of the Harz, comparatively poor in nutrients and bases, so that only a few herbaceous plants occur here, such as heath bedstraw ( Galium saxatile ). For that reason it is more the ferns, mosses, lichens and fungi that, in addition to spruce trees, characterise these woods. Boulders and stone runs occur in the areas of weather-resistant rock in the high (alti-)montane and montane zones – these are extreme habitats for vegetation. Due to

8991-546: The hills lie the Cretaceous layers of the sub-Hercynian depression in the rolling hills of the Harz Foreland; south of the Harz, Permian sediments lie flat on southwest-dipping Palaeozoic beds. As a result of the northern fault zone and the vertical or, sometimes even overfolded, geological strata, the geology of the Harz sometimes changes frequently within a relatively small area of just a few square kilometres. As

9102-526: The hummocks are preferred by Sphagnum magellanicum . The blanket of peat moss is penetrated by dwarf bushes such as cowberry and blueberry . Bog-rosemary ( Andromeda polifolia ) is a relict of the ice age. Other such ice age plants include the dwarf birch ( Betula nana ) and few-flowered sedge ( Carex pauciflora ). Cranberries ( Vaccinium oxicoccus ) bloom from May to June. The black crowberry ( Empetrum nigrum ) may also be seen amongst those bearing black fruit. Common heather (Calluna vulgaris) grows on

9213-537: The king's restricted forests . There were three restricted forests, so described, in the state of Saxony, where there was no longer unfettered access for everyone. This ban did not last forever. Mining, ironworks, water management, increasing settlement, woodland clearances, cattle driving, agriculture, and later tourism all undermined this imperial protection over the centuries. As early as 1224, monks who had settled in Walkenried bought extensive tracts of forest in

9324-502: The lack of soil material, only weak, straggly, very open spruce woods thrive here. They have an especially high variety of trees and allow more room of light-loving species such as silver birch, rowan, sycamore, willow and dwarf bushes such as the blueberry ( Vaccinium myrtillus ). Mosses and ferns are also common here. One unusual species is the Carpathian birch ( Betula pubescens subsp. carpatica ). Bog-spruce woods are found around

9435-469: The major contributors being Thomas Alva Edison and Nikola Tesla . Previously the only way to produce electricity was by chemical reactions or using battery cells, and the only practical use of electricity was for the telegraph . Electricity generation at central power stations started in 1882, when a steam engine driving a dynamo at Pearl Street Station produced a DC current that powered public lighting on Pearl Street , New York . The new technology

9546-414: The near-natural habitat there are only a few, indigenous, genetically adapted ( autochthonous ) spruce trees. Wood-reed spruce woods dominate. A well developed ground vegetation thrives on their moderately rocky and fresh, but certainly not wet, soils, characterised in appearance especially by grasses such as shaggy wood-reed ( Calamagrostis villosa ) and wavy hair-grass ( Avenella flexuosa ). The soils in

9657-496: The negative side effects of mining in the Harz Mountains. In 1818, a mounted forester, Spellerberg, from Lautenthal, killed the last lynx in the Harz on the Teufelsberg. At the start of the 19th century, the increasing changes to the natural landscape wrought by man and the extinction of large mammals like the bear, wolf and lynx raised awareness of the threat to nature. Electricity generation Electricity generation

9768-675: The north and east, and Nordhausen in the south. The districts of the Upper Harz are Goslar and Göttingen (both in Lower Saxony), whilst the Lower Harz is on the territory of Harz and Mansfeld-Südharz districts (both in Saxony-Anhalt). The Upper Harz is generally higher and features fir forests, whilst the Lower Harz gradually descends into the surrounding area and has deciduous forests interspersed with meadows. The dividing line between Upper and Lower Harz follows approximately

9879-550: The oldest, first, deepest feelings of truth. On 23 March 1798, the last wolf was killed in the Harz near the Plessenburg. The count's guest house on the Heinrichshöhe had become too small and suffered from overcrowding; in 1799 it burned down. In 1800, a new guest house was built on the Brocken to replace it. Around 1800, large swathes of the Harz were deforested. The less resistant spruce monoculture, that arose as

9990-425: The other major large-scale solar generation technology, which uses heat to drive a variety of conventional generator systems. Both approaches have their own advantages and disadvantages, but to date, for a variety of reasons, photovoltaic technology has seen much wider use. As of 2019 , about 97% of utility-scale solar power capacity was PV. In some countries, the nameplate capacity of photovoltaic power stations

10101-739: The raised bogs on marshy and boggy soils. In these sorts of places spruce woods can, in exceptional cases, also form the natural woodland in lower down the mountains. These wet, moorland woods have a high proportion of peat mosses ( Sphagnum spec. ). The ground vegetation may also have a rich proliferation of low bushes such as cowberry ( Vaccinium vitis-idaea ). Clumps of purple moor grass ( Molinia caerulea ) are also typical of this type of woodland habitat. The characteristic species of fungi in natural spruce woods are Phellinus viticola and prunes and custard ( Tricholomopsis decora ). Ravine ( Schluchtwald ), riparian ( Auwald ) and river source ( Quellwald ) woods only occur in small areas. In these places

10212-483: The rich food supplies of the mountain brooks. In 2000, the lynx was successfully reintroduced by the Harz National Park , and it has since fitted well into the ecology of the region. Through specific conservation measures in past years, the retreat of the bat population in the Harz has been halted. Amongst the mammals that may be hunted are the red deer , roe deer , wild boar and mouflon . The Harz

10323-579: The silver mining industry in the Upper Harz and in Goslar. In the middle of the 14th century, the settlements in the Harz became heavily depopulated as a result of the Black Death , and a systematic resettlement of mining villages in the Upper Harz did not take place until the first half of the 16th century. In 1588, the Nordhausen doctor, Johannes Thal, published the first book on regional flora in

10434-468: The south Harz lies in the Thuringian district of Nordhausen. The Harz National Park is located in the Harz; the protected area covers the Brocken and surrounding wilderness area. Approximately 600,000 people live in towns and villages of the Harz Mountains. Because of the heavy rainfall in the region the rivers of the Harz Mountains were dammed from an early date. Examples of such masonry dams are

10545-660: The spruce woods, more open beech forest with its higher population of small mammals in its search for food. For cover, however, it prefers the darker, denser spruce trees. A large number of the animals that live in natural spruce forest are suited to the special conditions of life in the higher parts of the Harz. Typical residents amongst the bird population include the crested tit ( Parus cristatus ), goldcrest and firecrest ( Regulus regulus and Regulus ignicapillus ), siskin ( Carduelis spinus ), treecreeper ( Certhia familiaris ), coal tit ( Parus ater ) and crossbill ( Loxia curvirostra ). Special mention should be made here of

10656-529: The stage about 250,000 years ago and hunted aurochs , bison , brown bear and cave bear , mammoths , rhinos , horses , reindeer , forest elephants and other animals in the Harz region. Tools used by Neanderthals were discovered inter alia in the Einhorn Cave in the southern Harz (100,000 years ago) and in the Rübeland Caves. Finds of birch pitch near Aschersleben on the northern edge of

10767-494: The stones, e. g. caddis fly larvae ( Trichoptera ) and snails , or can only live in the reduced water velocities on the bed of the stream or on stones by having flat body shapes, e. g. stonefly larvae. In the calmer parts of the stream, behind stones or in blankets of moss, there are also water beetles ( Hydrophilidae ) and small shrimp-like amphipods . Occasionally the golden-ringed dragonfly ( Cordulegaster boltoni ) and beautiful demoiselle ( Calopteryx virgo ),

10878-493: The sub-Hercynian phase (83  mya ), when the northern edge was steeply tilted. This formed a fault zone on the northern border of the Harz (the Northern Harz Boundary Fault or Harznordrandverwerfung ). The Harz is a fault-block range, that rises abruptly from the surrounding lowlands in the west and northeast and gradually dips towards the south. It is dissected by numerous deep valleys. North of

10989-500: The town of Goslar , and mines became established in the following centuries throughout the mountains. During the Middle Ages , ore from this region was exported along trade routes to far-flung places, such as Mesopotamia . The wealth of the region declined after these mines became exhausted in the early 19th century. People abandoned the towns for a short time, but prosperity eventually returned with tourism. Between 1945 and 1990,

11100-400: The town of Lüneburg . This Lower Saxony location article is a stub . You can help Misplaced Pages by expanding it . Harz mountains The Harz has a length of 110 kilometres (68 mi), stretching from the town of Seesen in the northwest to Eisleben in the east, and a width of 35 kilometres (22 mi). It occupies an area of 2,226 square kilometres (859 sq mi), and

11211-444: The turbine to force a generator to spin. Natural gas power plants are more efficient than coal power generation, they however contribute to climate change, but not as highly as coal generation. Not only do they produce carbon dioxide from the ignition of natural gas, the extraction of gas when mined releases a significant amount of methane into the atmosphere. Nuclear power plants create electricity through steam turbines where

11322-593: The two largest: the Oker Dam and the Rappbode Dam . The clear, cool water of the mountain streams was also dammed by early mountain folk to form the various mountain ponds of the Upper Harz waterways, such as the Oderteich . The 17 dams in the Harz block a total of twelve rivers. Because the Harz is one of the regions of Germany that experiences the most rainfall, its water power was used from early times. Today

11433-413: The use of nuclear sources. Per unit of electricity generated coal and gas-fired power life-cycle greenhouse gas emissions are almost always at least ten times that of other generation methods. Centralised generation is electricity generation by large-scale centralised facilities, sent through transmission lines to consumers. These facilities are usually located far away from consumers and distribute

11544-466: The western Harz, to secure economically the one quarter of the Rammelsberg ore profits promised to them by Frederick Barbarossa in 1129. From that it can be deduced that there was already a shortage of wood then. From the 12th to the 14th centuries, large parts of the Harz were managed economically by the Cistercian Abbey of Walkenried . As well as agriculture and fishing, they also controlled

11655-520: The world, Silva hercynia , in which he described the flowers specific to the Harz. In 1668, Rudolph Augustus, Duke of Brunswick-Lüneburg granted the first conservation order for Baumann's Cave . The ducal decree stated, inter alia , that the cave should be permanently preserved by all those responsible as a special, natural wonder. It also stated that nothing should be spoiled or destroyed, and that groups of ordinary strangers should not be allowed to enter without prior arrangement. A resident mine worker

11766-698: The worst effects of climate change. Like other organizations including the Energy Impact Center (EIC) and the United Nations Economic Commission for Europe (UNECE), the IEA has called for the expansion of nuclear and renewable energy to meet that objective. Some, like EIC founder Bret Kugelmass, believe that nuclear power is the primary method for decarbonizing electricity generation because it can also power direct air capture that removes existing carbon emissions from

11877-437: Was entrusted to oversee the natural monument . Until the issue of this conservation order, there had only been an order for the protection of the forest, which had been issued by the ruling princes for real, practical considerations. But for the first time the 1668 cave order took ethical-aesthetic considerations into account. The year 1668 was the birth of classic nature conservation in the Harz. The order had been precipitated by

11988-486: Was first mentioned as Hartingowe in an 814 deed by the Carolingian King Louis the Pious . Settlement within the mountains began only 1000 years ago, as in ancient times dense forests made the region almost inaccessible. The suffix -rode (from German : roden , to stub) denotes a place where woodland had been cleared to develop a settlement. The year 968 saw the discovery of silver deposits near

12099-497: Was quickly adopted by many cities around the world, which adapted their gas-fueled street lights to electric power. Soon after electric lights would be used in public buildings, in businesses, and to power public transport, such as trams and trains. The first power plants used water power or coal. Today a variety of energy sources are used, such as coal , nuclear , natural gas , hydroelectric , wind , and oil , as well as solar energy , tidal power , and geothermal sources. In

12210-409: Was reported that the global electricity supply was approaching peak CO2 emissions thanks to the growth of solar and wind power. The fundamental principles of electricity generation were discovered in the 1820s and early 1830s by British scientist Michael Faraday . His method, still used today, is for electricity to be generated by the movement of a loop of wire, or Faraday disc , between the poles of

12321-525: Was sufficient food to support it (insects, small mammals and small birds) as well as standing dead wood (spruce trees with woodpecker holes). In addition to the many species of birds, there is a range of large butterflies in the various spruce woods that, outside of the Harz, are seriously endangered or simply non-existent. Two species will be mentioned here as examples. Gnophos sordarius occurs in old, open wood-reed spruce forest, sometimes in connection with stone runs or bog spruce forests; Enthephria caesiata

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