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100-568: The name is of topographic origins derived from petroleum ( ropa in Czech and Polish). Ropice is located about 18 kilometres (11 mi) east of Frýdek-Místek and 24 km (15 mi) southeast of Ostrava , in the historical region of Cieszyn Silesia . It lies in the Moravian-Silesian Foothills . The highest point is the hill Štěpnice at 359 m (1,178 ft) above sea level. The Ropičanka Stream flows through

200-490: A "similar attitude towards food," whereas Chicago 's link with Warsaw , Poland began with Chicago's historic Polish community . The twinning of Indianapolis with Monza , Italy, is due to both cities' long association with auto racing . A twin towns program was instituted in the United States in 1956 when President Dwight D. Eisenhower proposed a citizen diplomacy initiative. Sister Cities International (SCI)

300-519: A "tuning" partnership based on a shared musical heritage and culture offer, at the initiative of Bristol Mayor George Ferguson . Annecy , France and Nerima , Tokyo have for several years shared a partnership based on their "co-existent animation industry". Toledo, United States twinned with Toledo, Spain in 1931, and was the first city in North America to engage in town twinning. Vancouver, Canada twinned with Odesa, Ukraine in 1944,

400-603: A Baroque castle in the early 18th century. In 1785 the Saint Genois family sold Ropice to the Celesta family, who had made Neoclassical renovation of the castle in 1810. After Revolutions of 1848 in the Austrian Empire a modern municipal division was introduced in the re-established Austrian Silesia . The village as a municipality was subscribed to the political and legal district of Cieszyn . According to

500-534: A common etymology . These similarities usually arise from sharing the same or related language or having been a colony or previously conquered. The twinning of towns and cities is sometimes done for political purposes. The Hungarian city Gyöngyös was twinned with the Azerbaijani city of Shusha in 2013, signing the twinning agreement with representatives from the Azerbaijani government; Hungary recognised Shusha as de jure part of Azerbaijan , even though it

600-575: A factory in the Republic of Karelia in Russia and offered the same profit-sharing plan to its Russian employees. China's sister city relationships are managed by the Chinese People's Association for Friendship with Foreign Countries , a united front organization. Sister city initiatives are an increasingly widespread mechanism for Chinese public diplomacy . From the early 2000s until 2024,

700-520: A fluid resembling petroleum, which when treated in the same way as the seep oil gave similar products. Young found that by slow distillation he could obtain several useful liquids from it, one of which he named "paraffine oil" because at low temperatures it congealed into a substance resembling paraffin wax. The production of these oils and solid paraffin wax from coal formed the subject of his patent dated October 17, 1850. In 1850, Young & Meldrum and Edward William Binney entered into partnership under

800-401: A hierarchical relationship. In the 2010s, Tokyo began to actively promote 'city diplomacy' with other global cities at the initiative of governor Yoichi Masuzoe . Relationships between communities can also arise because of shared names; they may be named after one community (as in the case of Córdoba ), they may share names (as in the case of Santiago de Compostela ), or their names may have

900-611: A link that still exists. Since 9 April 1956 Rome and Paris have been exclusively and reciprocally twinned with each other, following the motto: "Only Paris is worthy of Rome; only Rome is worthy of Paris." Within Europe, town twinning is supported by the European Union. The support scheme was established in 1989. In 2003 an annual budget of about € 12 million was allocated to about 1,300 projects. The Council of European Municipalities and Regions also works closely with

1000-512: A much shallower level. The Athabasca oil sands are one example of this. An alternative mechanism to the one described above was proposed by Russian scientists in the mid-1850s, the hypothesis of abiogenic petroleum origin (petroleum formed by inorganic means), but this is contradicted by geological and geochemical evidence. Abiogenic sources of oil have been found, but never in commercially profitable amounts. "The controversy isn't over whether abiogenic oil reserves exist," said Larry Nation of

1100-476: A process known as catagenesis . Formation of petroleum occurs from hydrocarbon pyrolysis in a variety of mainly endothermic reactions at high temperatures or pressures, or both. These phases are described in detail below. In the absence of plentiful oxygen, aerobic bacteria were prevented from decaying the organic matter after it was buried under a layer of sediment or water. However, anaerobic bacteria were able to reduce sulfates and nitrates among

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1200-456: A separate municipality again. Polish minority makes up 19.6% of the population. There is a modern golf course in Ropice. Ropice Castle was confiscated by the state in 1945 and until the 1970s it was used as a school. Then it was uninhabited and fell into disrepair. It is currently privately owned and since 2011 gradually reconstructed. A parish church was built here in the second half of

1300-574: A set of parallel reactions, and oil eventually breaks down to natural gas by another set of reactions. The latter set is regularly used in petrochemical plants and oil refineries . Sister city A sister city or a twin town relationship is a form of legal or social agreement between two geographically and politically distinct localities for the purpose of promoting cultural and commercial ties. While there are early examples of international links between municipalities akin to what are known as sister cities or twin towns today dating back to

1400-665: A significant amount of petroleum while drilling for lignite in Wietze , Germany. Wietze later provided about 80% of German consumption in the Wilhelminian Era. The production stopped in 1963, but Wietze has hosted a Petroleum Museum since 1970. Oil sands have been mined since the 18th century. In Wietze in lower Saxony, natural asphalt/bitumen has been explored since the 18th century. Both in Pechelbronn as in Wietze,

1500-409: A sort of international relations that works in parallel to the conventional system involving embassies, ambassadors, and treaties negotiated at the level of nation states . According to Rodrigo Tavares , the earliest formal attempts to establish city diplomacy across national boundaries took place in the 19th century. Only a handful of cities were involved in the 19th-century efforts; it was not until

1600-574: A source of internal and inter-state conflict, leading to both state-led wars and other resource conflicts . Production of petroleum is estimated to reach peak oil before 2035 as global economies lower dependencies on petroleum as part of climate change mitigation and a transition towards renewable energy and electrification . The word petroleum comes from Medieval Latin petroleum (literally 'rock oil'), which comes from Latin petra 'rock' (from Greek pétra πέτρα ) and oleum 'oil' (from Greek élaion ἔλαιον ). The origin of

1700-546: A twin town. Twinned towns are often chosen because of similarities between them; thus about 15 towns in Wales are twinned with towns in Brittany , and Oxford is with Bonn , Leiden , Grenoble and other university cities. In Italy, two sets of twins are Rovigo with Viernheim , and Bedford with Tulcea . Many former West German cities are twinned with former East German cities; these twinning links were established before

1800-411: A variety of liquid, gaseous, and solid components. Lighter hydrocarbons are the gases methane , ethane , propane and butane . Otherwise, the bulk of the liquid and solids are largely heavier organic compounds, often hydrocarbons (C and H only). The proportion of light hydrocarbons in the petroleum mixture varies among oil fields . An oil well produces predominantly crude oil. Because the pressure

1900-526: A visit to Fort Duquesne in 1750. Early British explorers to Myanmar documented a flourishing oil extraction industry based in Yenangyaung that, in 1795, had hundreds of hand-dug wells under production. Merkwiller-Pechelbronn is said to be the first European site where petroleum has been explored and used. The still active Erdpechquelle, a spring where petroleum appears mixed with water has been used since 1498, notably for medical purposes. There

2000-491: A year before Drake's Pennsylvania operation and could be argued to be the first commercial oil well in North America. The discovery at Oil Springs touched off an oil boom which brought hundreds of speculators and workers to the area. Advances in drilling continued into 1862 when local driller Shaw reached a depth of 62 metres using the spring-pole drilling method. On January 16, 1862, after an explosion of natural gas , Canada's first oil gusher came into production, shooting into

2100-491: Is called diagenesis , a word that means a transformation of materials by dissolution and recombination of their constituents. Kerogen formation continued to a depth of about 1 km from the Earth's surface where temperatures may reach around 50 °C . Kerogen formation represents a halfway point between organic matter and fossil fuels : kerogen can be exposed to oxygen, oxidize and thus be lost, or it could be buried deeper inside

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2200-726: Is considered a sticky, black, tar-like form of crude oil which is so thick and heavy that it must be heated or diluted before it will flow. Venezuela also has large amounts of oil in the Orinoco oil sands , although the hydrocarbons trapped in them are more fluid than in Canada and are usually called extra heavy oil . These oil sands resources are called unconventional oil to distinguish them from oil which can be extracted using traditional oil well methods. Between them, Canada and Venezuela contain an estimated 3.6 trillion barrels (570 × 10 ^  m ) of bitumen and extra-heavy oil, about twice

2300-738: Is done after a study of the relevant structural geology , analysis of the sedimentary basin , and characterization of the petroleum reservoir . There are also unconventional reserves such as oil sands and oil shale which are recovered by other means such as fracking . Once extracted, oil is refined and separated, most easily by distillation , into innumerable products for direct use or use in manufacturing. Products include fuels such as gasoline (petrol), diesel , kerosene and jet fuel ; asphalt and lubricants ; chemical reagents used to make plastics ; solvents , textiles , refrigerants , paint , synthetic rubber , fertilizers , pesticides , pharmaceuticals , and thousands of others. Petroleum

2400-415: Is in a separate smaller painting (above its main one) showing a beech tree, intended as a symbol of prosperity and from which Carshalton Beeches in the borough derives its name. Another example of the use of public art is the wall sculpture of the partner cities of Munich , Germany. A recent study has concluded that geographical distance has very little, if any, influence upon communities' selections of

2500-473: Is lower at the surface than underground, some of the gas will come out of solution and be recovered (or burned) as associated gas or solution gas . A gas well produces predominantly natural gas . However, because the underground temperature is higher than at the surface, the gas may contain heavier hydrocarbons such as pentane, hexane , and heptane (" natural-gas condensate ", often shortened to condensate. ) Condensate resembles gasoline in appearance and

2600-756: Is now called the Drake Well in Cherrytree Township, Pennsylvania .There also was a company associated with it, and it sparked a major oil drilling boom. The first commercial oil well in Canada became operational in 1858 at Oil Springs, Ontario (then Canada West ). Businessman James Miller Williams dug several wells between 1855 and 1858 before discovering a rich reserve of oil four metres below ground. Williams extracted 1.5 million litres of crude oil by 1860, refining much of it into kerosene lamp oil. Williams's well became commercially viable

2700-451: Is similar in composition to some volatile light crude oils . The hydrocarbons in crude oil are mostly alkanes , cycloalkanes and various aromatic hydrocarbons , while the other organic compounds contain nitrogen , oxygen , and sulfur , and traces of metals such as iron, nickel, copper and vanadium . Many oil reservoirs contain live bacteria. The exact molecular composition of crude oil varies widely from formation to formation but

2800-447: Is twinned with Dorval, Quebec ; Huai'an, China , and Neyagawa, Osaka , Japan. Town twinning begins for a variety of reasons. Generally, partner towns have similar demographics and size. They may arise from business connections, travel, similar industries, diaspora communities, or shared history. For example, the partnership between Portland, Oregon and Bologna , Italy arose from shared industries in biotechnology and education, and

2900-473: Is used in manufacturing a vast variety of materials essential for modern life, and it is estimated that the world consumes about 100 million barrels (16 million cubic metres ) each day. Petroleum production played a key role in industrialization and economic development. Some countries, known as petrostates , gained significant economic and international power over their control of oil production and trade. Petroleum exploitation can be damaging to

3000-576: The Duchy of Teschen (1297 described bilaterally as part of Poland), since 1327 within the Kingdom of Bohemia . The village became a seat of a Catholic parish , mentioned in the register of Peter's Pence payment from 1447 among 50 parishes of Teschen deanery as Ropicza . After the 1540s Protestant Reformation prevailed in the Duchy of Teschen and a local Catholic church was taken over by Lutherans . It

3100-674: The Earth's crust and be subjected to conditions which allow it to slowly transform into fossil fuels like petroleum. The latter happened through catagenesis in which the reactions were mostly radical rearrangements of kerogen. These reactions took thousands to millions of years and no external reactants were involved. Due to the radical nature of these reactions, kerogen reacted towards two classes of products: those with low H/C ratio ( anthracene or products similar to it) and those with high H/C ratio ( methane or products similar to it); i.e., carbon-rich or hydrogen-rich products. Because catagenesis

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3200-490: The Orinoco Belt . While significant volumes of oil are extracted from oil sands, particularly in Canada, logistical and technical hurdles remain, as oil extraction requires large amounts of heat and water, making its net energy content quite low relative to conventional crude oil. Thus, Canada's oil sands are not expected to provide more than a few million barrels per day in the foreseeable future. Petroleum consists of

3300-745: The Soviet Union in total output. In 1973 , Saudi Arabia and other Arab nations imposed an oil embargo against the United States, United Kingdom, Japan and other Western nations which supported Israel in the Yom Kippur War of October 1973. The embargo caused an oil crisis . This was followed by the 1979 oil crisis , which was caused by a drop in oil production in the wake of the Iranian Revolution and caused oil prices to more than double. The two oil price shocks had many short- and long-term effects on global politics and

3400-540: The United States , but is responsible for only one percent of electricity generation. Petroleum's worth as a portable, dense energy source powering the vast majority of vehicles and as the base of many industrial chemicals makes it one of the world's most important commodities . The top three oil-producing countries as of 2018 are the United States, Russia , and Saudi Arabia . In 2018, due in part to developments in hydraulic fracturing and horizontal drilling ,

3500-723: The World Economic Forum . In addition to C40, other organisations facilitating city diplomacy include the World Cities Summit , City Mayors Foundation , the Smart City Expo World Congress , the Strong City Network and 100 Resilient Cities. As of 2016, there were over 125 such multilateral networks and forums to facilitate international collaboration between different municipal authorities. A Bill introduced in

3600-455: The actinomycetales order of bacteria also produced antibiotic compounds (e.g., streptomycin ). Thus the action of anaerobic bacteria ceased at about 10 m below the water or sediment. The mixture at this depth contained fulvic acids, unreacted and partially reacted fats and waxes, slightly modified lignin , resins and other hydrocarbons. As more layers of organic matter settled into the sea or lake bed, intense heat and pressure built up in

3700-585: The 12th century. It has also been present in Romania since the 13th century, being recorded as păcură. Sophisticated oil pits, 4.5 to 6 metres (15 to 20 ft) deep, were dug by the Seneca people and other Iroquois in Western Pennsylvania as early as 1415–1450. The French General Louis-Joseph de Montcalm encountered Seneca using petroleum for ceremonial fires and as a healing lotion during

3800-830: The 14th century and first mentioned in 1447. In 1733–1736 the Baroque Church of Saint Catherine was built, but was replaced by a new church in 1806 that was consecrated to the Annunciation of the Virgin Mary. Ropice is twinned with: Petroleum Petroleum is a naturally occurring yellowish-black liquid mixture. It consists mainly of hydrocarbons , and is found in geological formations . The term petroleum refers both to naturally occurring unprocessed crude oil, as well as to petroleum products that consist of refined crude oil. Conventional reserves of petroleum are primarily recovered by drilling , which

3900-581: The 1990s, when the Nottingham City Council in the UK considered installing a tram network, it consulted experts from its twin city of Karlsruhe , which has one of the most extensive and efficient tram networks in Germany. With assistance from Karlsruhe's specialist engineers, Nottingham completed its second tram line in 2013. In 2014, Bristol and New Orleans announced their intention to form

4000-533: The 2019 session of the US Congress would have legislated for a City and State Diplomacy Act to create a new Office of Subnational Diplomacy at the Department of State . H.R.3571 - 116th Congress (2019-2020): City and State Diplomacy Act. Recently, the field of city diplomacy has taken a step beyond city-to-city exchanges to target the facilitation of dialogue between cities and multilateral organs, such as

4100-449: The 9th century, the modern concept was first established and adopted worldwide during World War II . Throughout history, many cities have participated in various cultural exchanges and similar activities that might resemble a sister-city or twin-city relationship, but the first officially documented case of such a relationship was a signed agreement between the leaders of the cities of Toledo, Ohio and Toledo, Spain in 1931. However,

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4200-503: The American Association of Petroleum Geologists. "The controversy is over how much they contribute to Earth's overall reserves and how much time and effort geologists should devote to seeking them out." Three conditions must be present for oil reservoirs to form: The reactions that produce oil and natural gas are often modeled as first order breakdown reactions, where hydrocarbons are broken down to oil and natural gas by

4300-483: The Battle of Stalingrad. The twinning between Coventry and Stalingrad was formalized in 1944 and, after the end of the war, similar links were established to foster friendship and understanding among former foes as an act of peace and reconciliation, with new twinnings between Coventry and German cities: Kiel as early as in 1947 and Dresden in 1956. In 1957, Coventry was officially twinned with Belgrade, even though

4400-512: The Dutch city was still occupied by the German Army in the final months of the war, and children from each city took part in exchanges in 1945 and 1946. Similarly, in 1947, Bristol Corporation (later Bristol City Council) sent five "leading citizens" on a goodwill mission to Hanover . Reading in 1947 was the first British town to form links with a former "enemy" city – Düsseldorf ,

4500-455: The Earth's surface. Unusual magma intrusions, however, could have created greater localized heating. Geologists often refer to the temperature range in which oil forms as an "oil window" . Below the minimum temperature oil remains trapped in the form of kerogen. Above the maximum temperature the oil is converted to natural gas through the process of thermal cracking . Sometimes, oil formed at extreme depths may migrate and become trapped at

4600-651: The French town; formal twinning charters were not exchanged until 1986. The practice was continued after the Second World War as a way to promote mutual understanding and cross-border projects of mutual benefit. For example, Coventry twinned with Stalingrad and later with Dresden as an act of peace and reconciliation, all three cities having been heavily bombed during the war. The city of Bath formed an " Alkmaar Adoption committee" in March 1945, when

4700-633: The Netherlands, the term is jumelage , partnerstad or stedenband ("city bond" when providing mutual support). In Greece, the word αδελφοποίηση ( adelphopiisi  – fraternisation) has been adopted. In Iceland, the terms vinabæir (friend towns) and vinaborgir (friend cities) are used. In the former Soviet Bloc , "twin towns" and "twin cities" were used, and in Russian, they use города-побратимы (sworn brother cities). The Americas, South Asia, and Australasia use

4800-574: The Scottish village of Dull and the US town of Boring, Oregon , agreed to twin their municipalities to promote tourism in both places, playing on their names. Recently some towns have made novelty twinning arrangements with fictional or virtual locations. Wincanton , England is partnered with Ankh-Morpork from Terry Pratchett 's Discworld books . Town twinning has increasingly been used to form strategic international business links. For example, in

4900-586: The Soviet Union included the goal to capture the Baku oilfields , as it would provide much-needed oil supplies for the German military which was suffering from blockades. Oil exploration in North America during the early 20th century later led to the U.S. becoming the leading producer by mid-century. As petroleum production in the U.S. peaked during the 1960s, the United States was surpassed by Saudi Arabia and

5000-548: The US). In Japan, the international city relations may be split into multiple terms, such as Sister Cities, Friendship Cooperation Cities, Business Partner Cities (BPC), Memorandum of Understanding (MOU), Sister Ports / Friendship Ports, etc. China mostly uses the term "friendship cooperation cities" rather than "sister cities", as the Chinese words for sisters, "姐妹" (reading: jiěmèi, literally elder sister and younger sister), could imply

5100-527: The United Kingdom, the term "twin towns" is most commonly used; the term "sister cities" is generally used for agreements with towns and cities in the Americas. In mainland Europe, the most commonly used terms are "twin towns", "partnership towns", "partner towns", and "friendship towns". The European Commission uses the term "twinned towns" and refers to the process as "town twinning". Spain uses

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5200-825: The United Nations. Not only cities and towns, but also provinces, states, territories, and regions enter into twinning agreements. For example, the Canadian province of Alberta has "sister province" agreements with Gangwon, South Korea (since 1974), Hokkaido, Japan (since 1980), Heilongjiang, China (1981), Jalisco, Mexico (1999), Ivano-Frankivsk, Ukraine (2004), Lviv, Ukraine (2005), Guangdong, China (2017), and California, United States (2018), as well as policy-oriented (as opposed to economic and cultural) agreements with Nevada, United States (since 2013), Missouri, United States (2015), and Texas, United States (2018). The earliest known town twinning in Europe

5300-576: The United States became the world's largest producer. About 80 percent of the world's readily accessible reserves are located in the Middle East , with 62.5 percent coming from the Arab five: Saudi Arabia , United Arab Emirates , Iraq , Qatar , and Kuwait . A large portion of the world's total oil exists as unconventional sources, such as bitumen in Athabasca oil sands and extra heavy oil in

5400-627: The air at a recorded rate of 480 cubic metres (3,000 bbl) per day. By the end of the 19th century the Russian Empire, particularly the Branobel company in Azerbaijan , had taken the lead in production. Access to oil was and still is a major factor in several military conflicts of the 20th century, including World War II , during which oil facilities were a major strategic asset and were extensively bombed . The German invasion of

5500-551: The area around modern Baku , Azerbaijan . These fields were described by the Persian geographer Abu Bakr al-Razi in the 10th century, and by Marco Polo in the 13th century, who described the output of those wells as hundreds of shiploads. Arab and Persian chemists also distilled crude oil to produce flammable products for military purposes. Through Islamic Spain , distillation became available in Western Europe by

5600-471: The censuses conducted in 1880–1910 the population of the municipality grew from 1,156 in 1880 to 1,291 in 1910 with a majority being native Polish-speakers (between 95.5% and 97.8%) accompanied by a small German-speaking minority (at most 39 or 3% in 1910) and Czech-speaking people (at most 19 or 1.5% in 1910). In terms of religion in 1910 the majority were Roman Catholics (53%), followed by Protestants (47%). After World War I , Polish–Czechoslovak War and

5700-474: The coal industry dominated the petroleum technologies. Chemist James Young in 1847 noticed a natural petroleum seepage in the coal mine at riddings Alfreton , Derbyshire from which he distilled a light thin oil suitable for use as lamp oil, at the same time obtaining a more viscous oil suitable for lubricating machinery. In 1848, Young set up a small business refining crude oil. Young eventually succeeded, by distilling cannel coal at low heat, in creating

5800-470: The commission (DG Education and Culture) to promote modern, high quality twinning initiatives and exchanges that involve all sections of the community. It has launched a website dedicated to town twinning. As of 1995, the European Union had more than 7,000 bilateral relationships involving almost 10,000 European municipalities, primarily French (2837 twinnings) and German (2485 twinnings). Public art has been used to celebrate twin town links, for instance in

5900-653: The division of Cieszyn Silesia in 1920, it became a part of Czechoslovakia . Following the Munich Agreement , in October 1938 together with the Trans-Olza region it was annexed by Poland , administratively adjoined to Cieszyn County of Silesian Voivodeship . It was then annexed by Nazi Germany at the beginning of World War II . After the war it was restored to Czechoslovakia . In 1980, Ropice became an administrative part of Třinec . In 2000, it became

6000-518: The earliest Chinese writings, cites that oil in its raw state, without refining, was first discovered, extracted, and used in China in the first century BCE. In addition, the Chinese were the first to record the use of petroleum as fuel as early as the fourth century BCE. By 347 CE, oil was produced from bamboo-drilled wells in China. In the 7th century, petroleum was among the essential ingredients for Greek fire , an incendiary projectile weapon that

6100-469: The environment and human health. Extraction , refining and burning of petroleum fuels all release large quantities of greenhouse gases , so petroleum is one of the major contributors to climate change . Other negative environmental effects include direct releases, such as oil spills , as well as air and water pollution at almost all stages of use. These environmental effects have direct and indirect health consequences for humans. Oil has also been

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6200-425: The fact that it happened at relatively low temperatures (when compared to commercial pyrolysis plants) of 60 to several hundred °C. Pyrolysis was possible because of the long reaction times involved. Heat for catagenesis came from the decomposition of radioactive materials of the crust, especially K , Th , U and U . The heat varied with geothermal gradient and was typically 10–30 °C per km of depth from

6300-470: The fall of the Iron Curtain . Famous examples are the partnerships of Hanover and Leipzig , both of which have important trade fair grounds , or between Hamburg and Dresden. The first US-German town twinning was in 1947 between Worthington, Minnesota and Crailsheim . St Petersburg in Russia holds the record for the largest number of partnership arrangements with other communities. In June 2012,

6400-466: The form of seven mural paintings in the centre of the town of Sutton , Greater London. The five main paintings show a number of the main features of the London Borough of Sutton and its four twin towns, along with the heraldic shield of each above the other images. Each painting also features a plant as a visual representation of its town's environmental awareness . In the case of Sutton this

6500-557: The genocide in 2016, some twin agreements such as Edirne – Haskovo were terminated by Turkey. China manages sister city relationships through the Chinese People's Association for Friendship with Foreign Countries (CPAFFC). In April 2019, CPAFFC president Li Xiaolin said, “Friendship city relations have become one of the important channels to implement the Belt and Road Initiative .” In January 2020, Shanghai canceled its sister city relationship with Prague after Prague's mayor signed

6600-751: The global economy. They led to sustained reductions in demand as a result of substitution to other fuels, especially coal and nuclear, and improvements in energy efficiency , facilitated by government policies. High oil prices also induced investment in oil production by non-OPEC countries, including Prudhoe Bay in Alaska, the North Sea offshore fields of the United Kingdom and Norway, the Cantarell offshore field of Mexico, and oil sands in Canada. About 90 percent of vehicular fuel needs are met by oil. Petroleum also makes up 40 percent of total energy consumption in

6700-408: The heavier end of the range, paraffin wax is an alkane with approximately 25 carbon atoms, while asphalt has 35 and up, although these are usually cracked in modern refineries into more valuable products. The lightest fraction, the so-called petroleum gases are subjected to diverse processing depending on cost. These gases are either flared off , sold as liquefied petroleum gas , or used to power

6800-549: The invention of the modern kerosene lamp (1853), the introduction of the first modern street lamp in Europe (1853), and the construction of the world's first modern oil "mine" (1854). at Bóbrka , near Krosno (still operational as of 2020). The demand for petroleum as a fuel for lighting in North America and around the world quickly grew. The first oil well in the Americas was drilled in 1859 by Edwin Drake at what

6900-446: The large number of co-eluted hydrocarbons within oil, many cannot be resolved by traditional gas chromatography. This unresolved complex mixture (UCM) of hydrocarbons is particularly apparent when analysing weathered oils and extracts from tissues of organisms exposed to oil. Crude oil varies greatly in appearance depending on its composition. It is usually black or dark brown (although it may be yellowish, reddish, or even greenish). In

7000-595: The link actually dates back to 1953 when then Yugoslav Ambassador visited Coventry and offered a gift of timber from his native country for use in the new Civic Theatre, which when finished was named Belgrade Theatre . The purpose of twinnings was then expanded to encourage trade and tourism or to reflect other links, such as towns sharing the same name or migration links. By the 2000s, town twinning became increasingly used to form strategic international business links among member cities, and may include localities of any scope such as villages, prefectures, or countries. In

7100-411: The lower regions. As a consequence, compounds of this mixture began to combine in poorly understood ways to kerogen . Combination happened in a similar fashion as phenol and formaldehyde molecules react to urea-formaldehyde resins, but kerogen formation occurred in a more complex manner due to a bigger variety of reactants. The total process of kerogen formation from the beginning of anaerobic decay

7200-899: The matter to H 2 S and N 2 respectively by using the matter as a source for other reactants. Due to such anaerobic bacteria, at first, this matter began to break apart mostly via hydrolysis : polysaccharides and proteins were hydrolyzed to simple sugars and amino acids respectively. These were further anaerobically oxidized at an accelerated rate by the enzymes of the bacteria: e.g., amino acids went through oxidative deamination to imino acids , which in turn reacted further to ammonia and α-keto acids . Monosaccharides in turn ultimately decayed to CO 2 and methane . The anaerobic decay products of amino acids, monosaccharides, phenols and aldehydes combined into fulvic acids . Fats and waxes were not extensively hydrolyzed under these mild conditions. Some phenolic compounds produced from previous reactions worked as bactericides and

7300-593: The modern concept of town twinning appeared during the Second World War. More specifically, it was inspired by the bombing of Coventry on 14 November 1940, known as the Coventry Blitz . First conceived by the then Mayor of Coventry , Alfred Robert Grindlay , culminating in his renowned telegram to the people of Stalingrad (now Volgograd ) in 1942, the idea emerged as a way of establishing solidarity links between cities in allied countries that went through similar devastating events. The comradeship between

7400-440: The municipality. The Olza River forms the northeastern municipal border. The creation of the village was a part of a larger settlement campaign taking place in the late 13th century on the territory of what will be later known as Upper Silesia . Ropice was first mentioned in a Latin document of Diocese of Wrocław called Liber fundationis episcopatus Vratislaviensis from around 1305 as Ropiza . Politically Ropice belonged to

7500-583: The number of China's sister city relationships doubled. More than one-third of Chinese sister city relationships are with sister cities in the east Asia Pacific region. Town twinning is supported in Japan by the Council of Local Authorities for International Relations , a joint agency of local governments established by the Japanese government in 1988 (similar to Sister Cities International , its counterpart in

7600-556: The proportion of chemical elements varies over fairly narrow limits as follows: Four different types of hydrocarbon appear in crude oil. The relative percentage of each varies from oil to oil, determining the properties of each oil. The alkanes from pentane (C 5 H 12 ) to octane (C 8 H 18 ) are refined into gasoline, the ones from nonane (C 9 H 20 ) to hexadecane (C 16 H 34 ) into diesel fuel , kerosene and jet fuel . Alkanes with more than 16 carbon atoms can be refined into fuel oil and lubricating oil . At

7700-644: The refinery's own burners. During the winter, butane (C 4 H 10 ), is blended into the gasoline pool at high rates, because its high vapour pressure assists with cold starts. The aromatic hydrocarbons are unsaturated hydrocarbons that have one or more benzene rings . They tend to burn with a sooty flame, and many have a sweet aroma. Some are carcinogenic . These different components are separated by fractional distillation at an oil refinery to produce gasoline, jet fuel, kerosene, and other hydrocarbon fractions. The components in an oil sample can be determined by gas chromatography and mass spectrometry . Due to

7800-412: The reservoir it is usually found in association with natural gas, which being lighter forms a "gas cap" over the petroleum, and saline water which, being heavier than most forms of crude oil, generally sinks beneath it. Crude oil may also be found in a semi-solid form mixed with sand and water, as in the Athabasca oil sands in Canada, where it is usually referred to as crude bitumen . In Canada, bitumen

7900-518: The same time the world's first, small, oil refinery was opened at Jasło in Poland (then Austria), with a larger one opened at Ploiești in Romania shortly after. Romania (then being a vassal of the Ottoman empire) is the first country in the world to have had its annual crude oil output officially recorded in international statistics: 275 tonnes for 1857. In 1858, Georg Christian Konrad Hunäus found

8000-523: The second half of the 19th century, the term became commonly known for the liquid form of hydrocarbons. Petroleum, in one form or another, has been used since ancient times. More than 4300 years ago, bitumen was mentioned when the Sumerians used it to make boats. A tablet of the legend of the birth of Sargon of Akkad mentions a basket which was closed by straw and bitumen. More than 4000 years ago, according to Herodotus and Diodorus Siculus , asphalt

8100-483: The term "ciudades hermanadas", which means "sister cities". Germany, Poland, and the Czech Republic each use Partnerstadt (German), miasto partnerskie (Polish) and partnerské město (Czech), which translate as "partner town" or "partner city". France uses ville jumelée (jumelage, twinned town or city), and Italy has gemellaggio (twinning) and comune gemellato (twinned municipality). In

8200-471: The term "sister cities" or "twin cities". In China, the term is 友好城市 (yǒuhǎo chéngshì – friendly cities). Sometimes, other government bodies enter into a twinning relationship, such as the agreement between the provinces of Hainan in China and Jeju in South Korea. The Douzelage is a town twinning association with one town from each of the member states of the European Union. Though

8300-454: The term is often used interchangeably with the term "friendship city", this may mean a relationship with a more limited scope in comparison to a sister city relationship, and friendship city relationships are mayor-to-mayor agreements. City diplomacy is a form of paradiplomacy that involves discussions between officials and residents of different cities. Often these cities will be located in different countries. As such, city diplomacy involves

8400-408: The term stems from monasteries in southern Italy where it was in use by the end of the first millennium as an alternative for the older term " naphtha ". After that, the term was used in numerous manuscripts and books, such as in the treatise De Natura Fossilium , published in 1546 by the German mineralogist Georg Bauer , also known as Georgius Agricola. After the advent of the oil industry, during

8500-539: The title of E.W. Binney & Co. at Bathgate in West Lothian and E. Meldrum & Co. at Glasgow; their works at Bathgate were completed in 1851 and became the first truly commercial oil-works in the world with the first modern oil refinery. The world's first oil refinery was built in 1856 by Ignacy Łukasiewicz in Austria. His achievements also included the discovery of how to distill kerosene from seep oil,

8600-418: The turn of the millennium that it became much more common. The first priority of those carrying out city diplomacy typically overlaps with the core aims of municipal government – improving the lives of local residents. Yet they will often collaborate with peers in other cities to work on issues of planet-wide concern, such as efforts to address climate change . The phrase "city diplomacy" is formally used in

8700-573: The two cities continued, when again in response to the Battle of Stalingrad , 830 women in Coventry – led by the subsequent Mayor Emily Smith – had their names embroidered on a tablecloth along with the words "Little help is better than a lot of pity" and sent it, along with money (each donated six pence), to the people of Stalingrad. The tablecloth can now be seen at the Panorama Museum of

8800-468: The volume of the world's reserves of conventional oil. Petroleum is a fossil fuel derived from fossilized organic materials , such as zooplankton and algae . Vast amounts of these remains settled to sea or lake bottoms where they were covered in stagnant water (water with no dissolved oxygen ) or sediments such as mud and silt faster than they could decompose aerobically . Approximately 1 m below this sediment, water oxygen concentration

8900-826: The workings of the United Cities and Local Governments and the C40 Cities Climate Leadership Group , and is recognised by the USC Center on Public Diplomacy . A March 2014 debate in the British House of Lords acknowledged the evolution of town twinning into city diplomacy, particularly in matters of trade and tourism, but also in culture and post-conflict reconciliation. The importance of cities developing "their own foreign economic policies on trade, foreign investment, tourism and attracting foreign talent" has also been highlighted by

9000-634: Was activity in various parts of the world in the mid-19th century. A group directed by Major Alexeyev of the Bakinskii Corps of Mining Engineers hand-drilled a well in the Baku region of Bibi-Heybat in 1846. There were engine-drilled wells in West Virginia in the same year as Drake's well. An early commercial well was hand dug in Poland in 1853, and another in nearby Romania in 1857. At around

9100-576: Was between Paderborn , Germany, and Le Mans , France, in 836. Starting in 1905, Keighley in West Yorkshire, England, had a twinning arrangement with French communities Suresnes and Puteaux . The first recorded modern twinning agreement was between Keighley and Poix-du-Nord in Nord, France, in 1920 following the end of the World War I . This was initially referred to as an adoption of

9200-414: Was closed off from external reactants, the resulting composition of the fuel mixture was dependent on the composition of the kerogen via reaction stoichiometry . Three types of kerogen exist: type I (algal), II (liptinic) and III (humic), which were formed mainly from algae , plankton and woody plants (this term includes trees , shrubs and lianas ) respectively. Catagenesis was pyrolytic despite

9300-574: Was controlled at the time and until 2020 by the military forces of Armenia and the unrecognised Republic of Artsakh . An attempt was made in 2003 by Preston city councillors in England to twin with the Palestinian town of Nablus in the name of solidarity. Turkey bans partnerships with any city in a country that recognizes the Armenian genocide . As a result, when Bulgaria recognized

9400-423: Was low, below 0.1 mg/L, and anoxic conditions existed. Temperatures also remained constant. As further layers settled into the sea or lake bed, intense heat and pressure built up in the lower regions. This process caused the organic matter to change, first into a waxy material known as kerogen , found in various oil shales around the world, and then with more heat into liquid and gaseous hydrocarbons via

9500-580: Was originally a program of the National League of Cities , but it became a separate corporation in 1967 due to the growth and popularity of the program. Twin town cultural events include the annual National Cherry Blossom Festival in Washington, D.C., honoring Washington's twin relationship with Tokyo City . Many twinned towns developed business agreements with their partners. For example, Vermont 's Ben & Jerry's Ice Cream company opened

9600-537: Was taken from them (as one from around fifty buildings in the region) by a special commission and given back to the Roman Catholic Church on 26 March 1654. In the early 15th century, a fortress was built in Ropice. The first known owners of Ropice were the Sobek family in 1430. The family owned the village until 1693. Around 1700, Ropice was acquired by Filip Saint Genois. He had rebuilt the fortress into

9700-415: Was the first twinned city in Canada and the second in North America, while Denver, United States , twinned with Brest, France , was the second twinned city in the United States. Liberal, Kansas was twinned with Olney, United Kingdom in 1950, and the cities have run a joint Pancake Day race ever since. Littleton, Colorado, twinned with Bega, Australia, in 1961. Tashkent , the capital city of Uzbekistan,

9800-458: Was twinned with Seattle , Washington, in 1973. Rochester, Minnesota , and Knebworth , UK, both centers for primary medical research, twinned in 1967. Ontario, California , has five sister cities around the world. They are Brockville, Ontario, Canada (since 1977); Guamúchil, Sinaloa, Mexico (since 1982); Mocorito, Sinaloa, Mexico (since 1982); Los Mochis, Sinaloa, Mexico (since 1988); and Winterthur, Canton of Zürich, Switzerland. Oakville, Ontario

9900-479: Was used by Byzantine Greeks against Arab ships, which were then attacking Constantinople . Crude oil was also distilled by Persian chemists , with clear descriptions given in Arabic handbooks such as those of Abu Bakr al-Razi (Rhazes). The streets of Baghdad were paved with tar , derived from petroleum that became accessible from natural fields in the region. In the 9th century, oil fields were exploited in

10000-544: Was used in the construction of the walls and towers of Babylon ; there were oil pits near Ardericca and Babylon, and a pitch spring on Zakynthos . Great quantities of it were found on the banks of the river Issus , one of the tributaries of the Euphrates . Ancient Persian tablets indicate the medicinal and lighting uses of petroleum in the upper levels of their society. The use of petroleum in ancient China dates back to more than 2000 years ago. The I Ching , one of

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