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Renewable energy is energy from renewable resources that are naturally replenished on a human timescale. Renewable resources include sunlight, wind, the movement of water, and geothermal heat.[2][3] Although most renewable energy sources are sustainable, some are not. For example, some biomass sources are considered unsustainable at current rates of exploitation.[4][5] Renewable energy is often used for electricity generation, heating and cooling. Renewable energy projects are typically large-scale, but they are also suited to rural and remote areas and developing countries, where energy is often crucial in human development.[6][7]
Submission declined on 18 December 2023 by DoubleGrazing (talk). Thank you for your submission, but the subject of this article already exists in Wikipedia. You can find it and improve it at Renewable energy instead.
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- Comment: Seems to be a copy of Renewable energy. -- DoubleGrazing (talk) 13:37, 18 December 2023 (UTC)
Renewable energy is often deployed together with further electrification, which has several benefits: electricity can move heat or objects efficiently, and is clean at the point of consumption.[8][9] From 2011 to 2021, renewable energy grew from 20% to 28% of global electricity supply. Use of fossil energy shrank from 68% to 62%, and nuclear from 12% to 10%. The share of hydropower decreased from 16% to 15% while power from sun and wind increased from 2% to 10%. Biomass and geothermal energy grew from 2% to 3%. There are 3,146 gigawatts installed in 135 countries, while 156 countries have laws regulating the renewable energy sector.[10] [11] In 2021, China accounted for almost half of the global increase in renewable electricity.[12]
Globally there are over 10 million jobs associated with the renewable energy industries, with solar photovoltaics being the largest renewable employer.[13] Renewable energy systems are rapidly becoming more efficient and cheaper and their share of total energy consumption is increasing,[14] with a large majority of worldwide newly installed electricity capacity being renewable.[15] In most countries, photovoltaic solar or onshore wind are the cheapest new-build electricity.[16]
Environmental Impacts of Using Renewable Energy:
It can reduce greenhouse gas emissions and contribute to slowing down the pace of climate change and its adverse effects on the Earth. For instance, there was a decline in greenhouse gas emissions in 33 European Environmental Agency (EEA) countries between 1990 and 2012. The decrease in emissions was accompanied by a 22% reduction per capita in these countries (EEA, 2016) due to alternative energy sources.[17]Transitioning away from fossil fuel sources helps preserve ecosystems, biodiversity, and natural resources, preventing degradation and loss of habitats. Using energy alternatives improves air quality, enhances public health, and reduces respiratory diseases, cardiovascular problems, and other health complications associated with air pollution[18]Conventional energy sources can cause geopolitical conflicts, like the ongoing Ukraine-Russia War. Energy-related factors, including control of gas pipelines, contributed to geopolitical tensions in the ongoing conflict and the Iran-Iraq War (1980-1988); the reason behind this war was underlying energy motives, particularly control over oil resources in the Middle East. Renewable energy minimizes geopolitical risks due to several factors, such as contrast with centralized sources, easing political tensions, and fostering improved international relations. It stabilizes because the abundance of renewable energy improves domestic politics.[19]
Many nations around the world already have renewable energy contributing more than 20% of their total energy supply, with some generating over half their electricity from renewables.[20] A few countries generate all their electricity using renewable energy.[21] National renewable energy markets are projected to continue to grow strongly in the 2020s and beyond.[22] According to the IEA, to achieve net zero emissions by 2050, 90% of global electricity generation will need to be produced from renewable sources.[23] Some studies have shown that a global transition to 100% renewable energy across all sectors – power, heat, transport and industry – is feasible and economically viable.[24][25][26]
Renewable energy resources exist over wide geographical areas, in contrast to fossil fuels, which are concentrated in a limited number of countries. Deployment of renewable energy and energy efficiency technologies is resulting in significant energy security, climate change mitigation, and economic benefits.[27] However renewables are being hindered by hundreds of billions of dollars of fossil fuel subsidies.[28] In international public opinion surveys there is strong support for renewables such as solar power and wind power.[29][30] In 2022 the International Energy Agency asked countries to solve policy, regulatory, permitting and financing obstacles to adding more renewables, to have a better chance of reaching net zero carbon emissions by 2050.[31]