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80-552: The GEA was a highly controversial piece of legislation within Ontario, in part due to the high initial tariff, up to 80.2 cents/kWh for small systems under microFIT. It was also viewed as controversial by stakeholders outside Ontario due to its "made in Ontario" clauses which demanded a certain amount of Ontario labor and manufacturing input in order to receive the tariff rates. Changes to the program and rates, some of them applied retroactively, added confusion and sparked complaints about

160-401: A human timescale . The most widely used renewable energy types are solar energy , wind power , and hydropower . Bioenergy and geothermal power are also significant in some countries. Some also consider nuclear power a renewable power source , although this is controversial. Renewable energy installations can be large or small and are suited for both urban and rural areas. Renewable energy

240-452: A competitive bidding system will be created, although projects that have already been contracted will not be affected by these changes. In December 2013, Chiarelli announced that the remaining local content requirements which had already been reduced would be removed entirely sometime in 2014 in order to comply with the WTO decision. As a result, concerns have been expressed that this will lead to

320-463: A faster rate than they are consumed". Solar power , wind power , hydroelectricity , geothermal energy, and biomass are widely agreed to be the main types of renewable energy. Renewable energy often displaces conventional fuels in four areas: electricity generation , hot water / space heating , transportation , and rural (off-grid) energy services. Although almost all forms of renewable energy cause much fewer carbon emissions than fossil fuels,

400-685: A fixed cost no matter the project size. The GEA effort was led by George Smitherman , the Minister of Energy and Infrastructure . It was claimed that the bill would help the government ensure the province’s future by: Among the key features of the Act were the following: Several non-profit organizations were active in supporting the implementation of the Green Energy Act with customized wikis to assist consumers and service providers, including SWITCH and OurPower (see Further Reading). MicroFIT

480-542: A following share of contract price per kilowatt-hour : $ 0.294 (> 6 kW < 10 kW) $ 0.288 (> 6 kW < 10 kW) Installation costs often exceed CA$ 50,000 and only about 9,000 projects have connected to the grid by late 2011 out of over 42,000 applicants. Concerns over islanding , lack of capacity and other problems have resulted in delays for many homeowners in installation, as connection points in some places have not been implemented. Cuts to pay rates generated further controversy. The signing of

560-437: A given time. Solar energy can only be captured during the day, and ideally in cloudless conditions. Wind power generation can vary significantly not only day-to-day, but even month-to-month. This poses a challenge when transitioning away from fossil fuels: energy demand will often be higher or lower than what renewables can provide. Both scenarios can cause electricity grids to become overloaded, leading to power outages . In

640-952: A large portion of the total, such as Kenya (43%) and Indonesia (5%). Technical advances may eventually make geothermal power more widely available. For example, enhanced geothermal systems involve drilling around 10 kilometres (6.2 mi) into the Earth, breaking apart hot rocks and extracting the heat using water. In theory, this type of geothermal energy extraction could be done anywhere on Earth. There are also other renewable energy technologies that are still under development, including enhanced geothermal systems , concentrated solar power , cellulosic ethanol , and marine energy . These technologies are not yet widely demonstrated or have limited commercialization. Some may have potential comparable to other renewable energy technologies, but still depend on further breakthroughs from research, development and engineering. Enhanced geothermal systems (EGS) are

720-782: A majority government. Under amendments passed by the Legislature in December 2005, Ontario elections were now held on fixed dates, namely the first Thursday of October every four years. The writ of election was issued by Lieutenant Governor David Onley on September 7, 2011. The election saw a then–record low voter turnout of 48.2%, only to be surpassed by the 2022 Ontario general election with 43.53%. In March 2009, PC Party leader John Tory stepped down as leader, with Tim Hudak elected to be his successor. Also in March 2009, Andrea Horwath replaced Howard Hampton as leader of

800-638: A more energy-dense biofuel like ethanol. Wood is the most significant biomass energy source as of 2012 and is usually sourced from a trees cleared for silvicultural reasons or fire prevention . Municipal wood waste – for instance, construction materials or sawdust – is also often burned for energy. The biggest per-capita producers of wood-based bioenergy are heavily forested countries like Finland, Sweden, Estonia, Austria, and Denmark. Bioenergy can be environmentally destructive if old-growth forests are cleared to make way for crop production. In particular, demand for palm oil to produce biodiesel has contributed to

880-506: A new type of geothermal power which does not require natural hot water reservoirs or steam to generate power. Most of the underground heat within drilling reach is trapped in solid rocks, not in water. EGS technologies use hydraulic fracturing to break apart these rocks and release the heat they contain, which is then harvested by pumping water into the ground. The process is sometimes known as "hot dry rock" (HDR). Unlike conventional geothermal energy extraction, EGS may be feasible anywhere in

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960-409: A range of construction strategies and technologies that aim to optimize the distribution of solar heat in a building. Examples include solar chimneys , orienting a building to the sun, using construction materials that can store heat , and designing spaces that naturally circulate air . From 2020 to 2022, solar technology investments almost doubled from USD 162 billion to USD 308 billion, driven by

1040-702: A variety of environmental conditions and perform more efficiently allowing a greater proportion of photon energy to end up in the storage compounds, i.e., carbohydrates (rather than building and sustaining living cells). However, prominent research faces hurdles, Sun Catalytix a MIT spin-off stopped scaling up their prototype fuel-cell in 2012 because it offers few savings over other ways to make hydrogen from sunlight. Most new renewables are solar, followed by wind then hydro then bioenergy. Investment in renewables, especially solar, tends to be more effective in creating jobs than coal, gas or oil. Worldwide, renewables employ about 12 million people as of 2020, with solar PV being

1120-456: Is thermal energy (heat) extracted from the Earth's crust . It originates from several different sources , of which the most significant is slow radioactive decay of minerals contained in the Earth's interior , as well as some leftover heat from the formation of the Earth . Some of the heat is generated near the Earth's surface in the crust, but some also flows from deep within the Earth from

1200-605: Is a renewable energy microgeneration program (less than 10 kW ) in the province of Ontario , launched in October 2009 following the Green Energy Act , alongside feed-in tariff (FIT) to provide incentives for landowners to generate wind , solar , hydroelectric or other clean energy to sell to the electrical grid . Most applications for microFIT generation have been for solar energy. By December 16, 2009, microFIT issued its first 700 contracts. Many solar photovoltaic companies have become involved in microFIT installations;

1280-471: Is a more economical means of long-term renewable energy storage, in terms of capital expenditures compared to pumped hydroelectric or batteries. Solar power produced around 1.3 terrawatt-hours (TWh) worldwide in 2022, representing 4.6% of the world's electricity. Almost all of this growth has happened since 2010. Solar energy can be harnessed anywhere that receives sunlight; however, the amount of solar energy that can be harnessed for electricity generation

1360-537: Is a technology for generating electricity by mixing fresh water and salty sea water in large power cells. Most marine energy harvesting technologies are still at low technology readiness levels and not used at large scales. Tidal energy is generally considered the most mature, but has not seen wide deployment. The world's largest tidal power station is on Sihwa Lake , South Korea, which produces around 550 gigawatt-hours of electricity per year. Earth emits roughly 10 W of infrared thermal radiation that flows toward

1440-419: Is about 800 times denser than air , even a slow flowing stream of water, or moderate sea swell , can yield considerable amounts of energy. Water can generate electricity with a conversion efficiency of about 90%, which is the highest rate in renewable energy. There are many forms of water energy: Much hydropower is flexible, thus complementing wind and solar. In 2021, the world renewable hydropower capacity

1520-525: Is common in Iceland, or to generate electricity. At smaller scales, geothermal power can be generated with geothermal heat pumps , which can extract heat from ground temperatures of under 30 °C (86 °F), allowing them to be used at relatively shallow depths of a few meters. Electricity generation requires large plants and ground temperatures of at least 150 °C (302 °F). In some countries, electricity produced from geothermal energy accounts for

1600-401: Is enough fuel for breeder reactors to satisfy the world's energy needs for 5 billion years at 1983's total energy consumption rate, thus making nuclear energy effectively a renewable energy. In addition to seawater the average crustal granite rocks contain significant quantities of uranium and thorium with which breeder reactors can supply abundant energy for the remaining lifespan of the sun on

1680-518: Is influenced by weather conditions , geographic location and time of day. There are two mainstream ways of harnessing solar energy: solar thermal , which converts solar energy into heat; and photovoltaics (PV), which converts it into electricity. PV is far more widespread, accounting for around two thirds of the global solar energy capacity as of 2022. It is also growing at a much faster rate, with 170 GW newly installed capacity in 2021, compared to 25 GW of solar thermal. Passive solar refers to

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1760-460: Is more valuable than VRE countries with large hydroelectric developments such as Canada and Norway are spending billions to expand their grids to trade with neighboring countries having limited hydro. Biomass is biological material derived from living, or recently living organisms. Most commonly, it refers to plants or plant-derived materials. As an energy source, biomass can either be used directly via combustion to produce heat, or converted to

1840-596: Is not possible to use or store excess electricity. Electrical energy storage is a collection of methods used to store electrical energy. Electrical energy is stored during times when production (especially from intermittent sources such as wind power , tidal power , solar power ) exceeds consumption, and returned to the grid when production falls below consumption. Pumped-storage hydroelectricity accounts for more than 85% of all grid power storage . Batteries are increasingly being deployed for storage and grid ancillary services and for domestic storage. Green hydrogen

1920-520: Is often associated with unsustainable deforestation . As part of the global effort to limit climate change , most countries have committed to net zero greenhouse gas emissions . In practice, this means phasing out fossil fuels and replacing them with low-emissions energy sources. This much needed process, coined as "low-carbon substitutions" in contrast to other transition processes including energy additions, needs to be accelerated multiple times in order to successfully mitigating climate change. At

2000-501: Is often deployed together with further electrification . This has several benefits: electricity can move heat and vehicles efficiently and is clean at the point of consumption. Variable renewable energy sources are those that have a fluctuating nature, such as wind power and solar power. In contrast, controllable renewable energy sources include dammed hydroelectricity , bioenergy , or geothermal power . Renewable energy systems have rapidly become more efficient and cheaper over

2080-477: Is that the heated water can be stored until it is needed, eliminating the need for a separate energy storage system. Solar thermal power can also be converted to electricity by using the steam generated from the heated water to drive a turbine connected to a generator. However, because generating electricity this way is much more expensive than photovoltaic power plants, there are very few in use today. Humans have harnessed wind energy since at least 3500 BC. Until

2160-662: Is to slow and eventually stop climate change , which is widely agreed to be caused mostly by greenhouse gas emissions . In general, renewable energy sources cause much lower emissions than fossil fuels. The International Energy Agency estimates that to achieve net zero emissions by 2050, 90% of global electricity generation will need to be produced from renewable sources. Renewables also cause much less air pollution than fossil fuels, improving public health, and are less noisy . The deployment of renewable energy still faces obstacles, especially fossil fuel subsidies , lobbying by incumbent power providers, and local opposition to

2240-563: The National Post , John Ivison noted in 2011 that Eclipsall Energy Corp, a newly created company in Scarborough, Ontario, that was touted by Premier Dalton McGuinty, only pays its workers 20% above minimum wage and that its manufacturing facility simply "assemble[s] glass and solar cells imported from Asia" (which allows it to qualify for the local content rules). In May 2013, Ontario Energy Minister Bob Chiarelli announced that

2320-463: The 2023 United Nations Climate Change Conference , around three-quarters of the world's countries set a goal of tripling renewable energy capacity by 2030. The European Union aims to generate 40% of its electricity from renewables by the same year. Renewable energy is more evenly distributed around the world than fossil fuels, which are concentrated in a limited number of countries. It also brings health benefits by reducing air pollution caused by

2400-585: The Energy Conservation Leadership Act , the Energy Efficiency Act and of particular note, November 2006's Renewable Energy Standard Offer Program. The Standard Offer, also known as SOP or RESOP for short, introduced a number of fixed 20-year feed-in tariffs for hydro , wind , solar (PV) and biomass projects. RESOP tariffs were relatively low, 42 cents/kWh for PV and 11 cents/kWh for other forms of energy. At

2480-726: The Green Energy Act promised to create 50,000 jobs, the Liberals admitted in 2013 that the Act had only created 31,000 jobs. Critics charge that even confirming this number is problematic because the large majority are "indirect" as opposed to "direct" employment. However, a 2011 report by Jim McCarter, Ontario's Auditor General, found that a large majority of these jobs were in construction and would only exist for no more than three years. In addition, McCarter's report also cited controversial reports from other countries which indicate "that for each job created through renewable energy programs, about two to four jobs are often lost in other sectors of

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2560-494: The NASA Office of Science and Technology Policy examined the concept and concluded that with current and near-future technologies it would be economically uncompetitive. Collection of static electricity charges from water droplets on metal surfaces is an experimental technology that would be especially useful in low-income countries with relative air humidity over 60%. Breeder reactors could, in principle, depending on

2640-574: The mantle and core . Geothermal energy extraction is viable mostly in countries located on tectonic plate edges, where the Earth's hot mantle is more exposed. As of 2023, the United States has by far the most geothermal capacity (2.7 GW, or less than 0.2% of the country's total energy capacity ), followed by Indonesia and the Philippines. Global capacity in 2022 was 15 GW. Geothermal energy can be either used directly to heat homes, as

2720-446: The 2007 election, and ran again in 2011. Those candidates not belonging to a major party, receiving more than 1,000 votes in the election, are listed below: There were 18 seats that changed allegiance from the 2007 election. Liberals Progressive Conservatives Did not endorse Renewable energy Renewable energy (or green energy ) is energy from renewable natural resources that are replenished on

2800-400: The 20th century, it was primarily used to power ships, windmills and water pumps. Today, the vast majority of wind power is used to generate electricity using wind turbines. Modern utility-scale wind turbines range from around 600 kW to 9 MW of rated power. The power available from the wind is a function of the cube of the wind speed, so as wind speed increases, power output increases up to

2880-611: The GEA corresponded with a dramatic increase in the Provincial Adjustment (now called the Global Adjustment). This is the cost added to the market price of electricity in Ontario. The Global Adjustment is made up of several different cost buckets, but the biggest one is guaranteed energy rates for generators. This is the difference between the rates that were guaranteed to generators by the provincial government, and

2960-584: The NDP at the leadership election . Thus, both the Progressive Conservatives and the NDP went into the election with a new leader. Green Party of Ontario leader Frank de Jong stepped down in November 2009; their leadership convention confirmed Mike Schreiner as their new leader. Dalton McGuinty won 95 percent support for his leadership at an Ontario Liberal annual general meeting after

3040-446: The burning of fossil fuels. The potential worldwide savings in health care costs have been estimated at trillions of dollars annually. The two most important forms of renewable energy, solar and wind, are intermittent energy sources : they are not available constantly, resulting in lower capacity factors . In contrast, fossil fuel power plants are usually able to produce precisely the amount of energy an electricity grid requires at

3120-778: The cold outer space. Solar energy hits the surface and atmosphere of the earth and produces heat. Using various theorized devices like emissive energy harvester (EEH) or thermoradiative diode, this energy flow can be converted into electricity. In theory, this technology can be used during nighttime. Producing liquid fuels from oil-rich (fat-rich) varieties of algae is an ongoing research topic. Various microalgae grown in open or closed systems are being tried including some systems that can be set up in brownfield and desert lands. There have been numerous proposals for space-based solar power , in which very large satellites with photovoltaic panels would be equipped with microwave transmitters to beam power back to terrestrial receivers. A 2024 study by

3200-554: The crops used to produce bioethanol and biodiesel are grown specifically for this purpose, although used cooking oil accounted for 14% of the oil used to produce biodiesel as of 2015. The biomass used to produce biofuels varies by region. Maize is the major feedstock in the United States, while sugarcane dominates in Brazil. In the European Union, where biodiesel is more common than bioethanol, rapeseed oil and palm oil are

3280-412: The deforestation of tropical rainforests in Brazil and Indonesia. In addition, burning biomass still produces carbon emissions, although much less than fossil fuels (39 grams of CO 2 per megajoule of energy, compared to 75 g/MJ for fossil fuels). Some biomass sources are unsustainable at current rates of exploitation (as of 2017). Biofuels are primarily used in transportation, providing 3.5% of

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3360-448: The economy because of higher electricity prices" which has led critics to charge that the Green Energy Act has actually resulted in a net loss of employment. A 2013 study by the conservative Fraser Institute stated that "wind power tends to be produced at times when it is least needed", and stated that: Eighty percent of Ontario’s generation of electricity from wind power occurs at times and seasons so far out of phase with demand that

3440-440: The entire output is surplus and is exported at a substantial loss ... The Auditor-General of Ontario estimates that the province has already lost close to $ 2-billion on such exports. The price of exports is determined by allowing electricity producers to bid on export offers at the price at which they are willing to produce it. The quality of the "green" manufacturing jobs created in Ontario has also been questioned. Writing in

3520-585: The fastest-growing renewable energy technology. It is cheap, low-maintenance and scalable; adding to an existing PV installation as demanded arises is simple. Its main disadvantage is its poor performance in cloudy weather. PV systems range from small, residential and commercial rooftop or building integrated installations, to large utility-scale photovoltaic power station . A household's solar panels can either be used for just that household or, if connected to an electrical grid, can be aggregated with millions of others. The first utility-scale solar power plant

3600-548: The fuel cycle employed, extract almost all of the energy contained in uranium or thorium , decreasing fuel requirements by a factor of 100 compared to widely used once-through light water reactors , which extract less than 1% of the energy in the actinide metal (uranium or thorium) mined from the earth. The high fuel-efficiency of breeder reactors could greatly reduce concerns about fuel supply, energy used in mining, and storage of radioactive waste . With seawater uranium extraction (currently too expensive to be economical), there

3680-420: The grid. This process was not streamlined, and often required hundreds of pages of documentation to be submitted to each organization, in the proper sequence. Certain areas of the Ontario distribution grid were also placed off-limits for development, due to load considerations. Even then, there were stakeholders at the municipal level that could block development at any time as part of local building codes. Due to

3760-744: The horizontal axis units currently in use. As offshore wind speeds average ~90% greater than that of land, offshore resources can contribute substantially more energy than land-stationed turbines. Investments in wind technologies reached USD 161 billion in 2020, with onshore wind dominating at 80% of total investments from 2013 to 2022. Offshore wind investments nearly doubled to USD 41 billion between 2019 and 2020, primarily due to policy incentives in China and expansion in Europe. Global wind capacity increased by 557 GW between 2013 and 2021, with capacity additions increasing by an average of 19% each year. Since water

3840-502: The increased cost of electricity is guaranteed payments to nuclear generators, followed, by gas, coal, and hydro generation. In March 2011, the Ontario Government claimed that the combined cost of new renewable and conservation measures had been shown to account for only about 3% of total electricity cost in Ontario, although it was acknowledged that amount will rise as more green energy comes on line in future years. Although

3920-447: The loss of "green" manufacturing jobs in Ontario. In February 2014, Jeff Garrah, CEO of Kingston's Economic Development Commission (KEDCO), cited the removal of the local content requirements as the reason for the bankruptcy of Centennial Global Technology Inc., which in November 2013 had been described as Canada's "leading national solar panel distributor". It was reported that the removal of the local content rules had effectively "pull[ed]

4000-515: The made-in-Ontario content requirements for wind and solar projects would be scrapped, after the World Trade Organization (WTO) ruled that they were a violation of WTO regulations. In June 2013, Chiarelli announced that the province's future Feed-in-Tariff contacts will now be limited to smaller projects (less than 500 kW) and that a cap of 900 MW of additional capacity will be set for deployment by 2018. For larger projects,

4080-408: The main feedstocks. China, although it produces comparatively much less biofuel, uses mostly corn and wheat. In many countries, biofuels are either subsidized or mandated to be included in fuel mixtures . There are many other sources of bioenergy that are more niche, or not yet viable at large scales. For instance, bioethanol could be produced from the cellulosic parts of crops, rather than only

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4160-504: The main sequence of stellar evolution. Artificial photosynthesis uses techniques including nanotechnology to store solar electromagnetic energy in chemical bonds by splitting water to produce hydrogen and then using carbon dioxide to make methanol. Researchers in this field strived to design molecular mimics of photosynthesis that use a wider region of the solar spectrum, employ catalytic systems made from abundant, inexpensive materials that are robust, readily repaired, non-toxic, stable in

4240-456: The maximum output for the particular turbine. Areas where winds are stronger and more constant, such as offshore and high-altitude sites, are preferred locations for wind farms. Wind-generated electricity met nearly 4% of global electricity demand in 2015, with nearly 63 GW of new wind power capacity installed. Wind energy was the leading source of new capacity in Europe, the US and Canada, and

4320-472: The medium-term, this variability may require keeping some gas-fired power plants or other dispatchable generation on standby until there is enough energy storage, demand response , grid improvement, and/or baseload power from non-intermittent sources. In the long-term, energy storage is an important way of dealing with intermittency. Using diversified renewable energy sources and smart grids can also help flatten supply and demand. Sector coupling of

4400-479: The past 30 years. A large majority of worldwide newly installed electricity capacity is now renewable. Renewable energy sources, such as solar and wind power, have seen significant cost reductions over the past decade, making them more competitive with traditional fossil fuels. In most countries, photovoltaic solar or onshore wind are the cheapest new-build electricity. From 2011 to 2021, renewable energy grew from 20% to 28% of global electricity supply. Power from

4480-437: The plug on local production". Describing the Green Energy Act as "an ongoing soap opera", Garrah stated that municipalities across Ontario have become dismayed with how its solar and wind power provisions have been implemented. On January 1, 2019, Ontario repealed the Green Energy Act . 2011 Ontario general election Dalton McGuinty Liberal Dalton McGuinty Liberal The 2011 Ontario general election

4560-571: The power generation sector with other sectors may increase flexibility: for example the transport sector can be coupled by charging electric vehicles and sending electricity from vehicle to grid . Similarly the industry sector can be coupled by hydrogen produced by electrolysis, and the buildings sector by thermal energy storage for space heating and cooling. Building overcapacity for wind and solar generation can help ensure sufficient electricity production even during poor weather. In optimal weather, it may be necessary to curtail energy generation if it

4640-465: The presence of fixed costs, including the administrative overhead, RESOP favoured large projects which could distribute these costs. It proved particularly successful for wind power developments, with almost 64% of the RESOP developments being wind, 28% biomass, and the rest a mix of hydro and a tiny amount of solar. RESOP included a built-in two-year review process that started in 2008. During this period,

4720-488: The primary challenges for new developments. It is popular to repower old dams thereby increasing their efficiency and capacity as well as quicker responsiveness on the grid. Where circumstances permit existing dams such as the Russell Dam built in 1985 may be updated with "pump back" facilities for pumped-storage which is useful for peak loads or to support intermittent wind and solar power. Because dispatchable power

4800-463: The program with higher rates and various changes to the connection process to simplify the workload. In particular, a number of proposals suggested adding additional classes for very small systems that would have minimal impact on the grid that could be given an express application process and pre-authorized access to connect. These systems would also be given much higher tariffs, in order to offset basic implementation details, like metering, that are often

4880-585: The second largest in China. In Denmark, wind energy met more than 40% of its electricity demand while Ireland, Portugal and Spain each met nearly 20%. Globally, the long-term technical potential of wind energy is believed to be five times total current global energy production, or 40 times current electricity demand, assuming all practical barriers needed were overcome. This would require wind turbines to be installed over large areas, particularly in areas of higher wind resources, such as offshore, and likely also industrial use of new types of VAWT turbines in addition to

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4960-527: The sector's increasing maturity and cost reductions, particularly in solar photovoltaic (PV), which accounted for 90% of total investments. China and the United States were the main recipients, collectively making up about half of all solar investments since 2013. Despite reductions in Japan and India due to policy changes and COVID-19 , growth in China, the United States, and a significant increase from Vietnam's feed-in tariff program offset these declines. Globally,

5040-418: The seed as is common today. Sweet sorghum may be a promising alternative source of bioethanol, due to its tolerance of a wide range of climates. Cow dung can be converted into methane. There is also a great deal of research involving algal fuel , which is attractive because algae is a non-food resource, grows around 20 times faster than most food crops, and can be grown almost anywhere. Geothermal energy

5120-496: The solar panels are also suitable for schools and places of worship. The projects benefit home, farm or business owners by revenue generation, reduce greenhouse gas emissions , and approved applicants are guaranteed to receive revenue for twenty years. The Green Energy Act aims to create 50,000 new green-collar jobs by 2012. According to the Ontario Power Authority , homeowners generating electricity receive

5200-451: The solar sector added 714 gigawatts (GW) of solar PV and concentrated solar power (CSP) capacity between 2013 and 2021, with a notable rise in large-scale solar heating installations in 2021, especially in China, Europe, Turkey, and Mexico. A photovoltaic system , consisting of solar cells assembled into panels , converts light into electrical direct current via the photoelectric effect . PV has several advantages that make it by far

5280-513: The sun and wind accounted for most of this increase, growing from a combined 2% to 10%. Use of fossil energy shrank from 68% to 62%. In 2022, renewables accounted for 30% of global electricity generation and are projected to reach over 42% by 2028. Many countries already have renewables contributing more than 20% of their total energy supply, with some generating over half or even all their electricity from renewable sources. The main motivation to replace fossil fuels with renewable energy sources

5360-468: The technology employing the most at almost 4 million. However, as of February 2024, the world's supply of workforce for solar energy is lagging greatly behind demand as universities worldwide still produce more workforce for fossil fuels than for renewable energy industries. In 2021, China accounted for almost half of the global increase in renewable electricity. There are 3,146 gigawatts installed in 135 countries, while 156 countries have laws regulating

5440-407: The ten biggest solar power stations are in China, including the biggest, Golmud Solar Park in China. Unlike photovoltaic cells that convert sunlight directly into electricity, solar thermal systems convert it into heat. They use mirrors or lenses to concentrate sunlight onto a receiver, which in turn heats a water reservoir. The heated water can then be used in homes. The advantage of solar thermal

5520-501: The term is not synonymous with low-carbon energy . Some non-renewable sources of energy, such as nuclear power , generate almost no emissions, while some renewable energy sources can be very carbon-intensive, such as the burning of biomass if it is not offset by planting new plants. Renewable energy is also distinct from sustainable energy , a more abstract concept that seeks to group energy sources based on their overall permanent impact on future generations of humans. For example, biomass

5600-420: The time, RESOP was named North America's first true feed-in tariff program. In practice, it was found that the RESOP program had a significant administrative overhead that eroded the value of the program. In order to connect a generation project, the provider had to not only meet expected requirements for the equipment, but also had to apply to various agencies and levels of government for permission to connect to

5680-484: The use of land for renewable installations. Like all mining, the extraction of minerals required for many renewable energy technologies also results in environmental damage . In addition, although most renewable energy sources are sustainable , some are not. Renewable energy is usually understood as energy harnessed from continuously occurring natural phenomena. The International Energy Agency defines it as "energy derived from natural processes that are replenished at

5760-599: The way the program was being managed. The GEA became a major topic of political discourse within Ontario and was heavily debated during the 2011 Ontario general election ; the PC party threatened to cancel the act outright if elected, while the Liberals actively supported the GEA as a primary plank of their re-election platform. Prior to the introduction of the GEA, Ontario had enacted a number of different programs to introduce renewable energy or promote conservation. These included

5840-530: The wholesale electricity rate which they are paid each month. In recent years, the wholesale rate has ranged between 1 and 3 cents per kWh. However, a June 2012 report by Bridgepoint Group Ltd. claimed most of this cost increase has been coincidental, rather than attributable to the fixed price for renewable energy. Likewise, the Ontario Energy Board claimed in April 2012 that the highest generator of

5920-484: The world's transport energy demand in 2022, up from 2.7% in 2010. Biojet is expected to be important for short-term reduction of carbon dioxide emissions from long-haul flights. Aside from wood, the major sources of bioenergy are bioethanol and biodiesel . Bioethanol is usually produced by fermenting the sugar components of crops like sugarcane and maize , while biodiesel is mostly made from oils extracted from plants, such as soybean oil and corn oil . Most of

6000-502: The world, depending on the cost of drilling. EGS projects have so far primarily been limited to demonstration plants , as the technology is capital-intensive due to the high cost of drilling. Marine energy (also sometimes referred to as ocean energy) is the energy carried by ocean waves , tides , salinity , and ocean temperature differences . Technologies to harness the energy of moving water include wave power , marine current power , and tidal power . Reverse electrodialysis (RED)

6080-498: The worldwide industry was also exploring a number of different ways to implement incentive programs. The main contenders were the feed-in tariff system, like RESOP, and emissions-trading systems like the UK's Renewable Obligation or New Jersey's Solar Renewable Energy Certificate . In 2008, Ernst & Young published Renewable energy country attractiveness indices for the first quarter of 2008 , which demonstrated that Germany's FIT program

6160-455: Was 1,360 GW. Only a third of the world's estimated hydroelectric potential of 14,000 TWh/year has been developed. New hydropower projects face opposition from local communities due to their large impact, including relocation of communities and flooding of wildlife habitats and farming land. High cost and lead times from permission process, including environmental and risk assessments, with lack of environmental and social acceptance are therefore

6240-522: Was built in 1982 in Hesperia, California by ARCO . The plant was not profitable and was sold eight years later. However, over the following decades, PV cells became significantly more efficient and cheaper. As a result, PV adoption has grown exponentially since 2010. Global capacity increased from 230 GW at the end of 2015 to 890 GW in 2021. PV grew fastest in China between 2016 and 2021, adding 560 GW, more than all advanced economies combined. Four of

6320-460: Was far more successful, delivering more power at lower costs. An earlier report from UC Berkeley demonstrated that job creation with renewables was far higher than fossil fuels, another argument in favour of the German-style program, which was then considered a great success. With the success of FIT programs, and in response to RESOP issues, a number of stakeholders suggested an expansion of

6400-647: Was held on October 6, 2011, to elect members of the 40th Legislative Assembly of Ontario . The Ontario Liberal Party was elected to a minority government , with the Progressive Conservative Party of Ontario (PC Party) serving as the Official Opposition and the Ontario New Democratic Party (NDP) serving as the third party. In the final result, Premier McGuinty's party fell one seat short of winning

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