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And solar is among the most scalable technologies that can deliver fast change,\u201d said Nicolas Fulghum, senior data analyst at Ember. The data produced by third parties and made available by Our World in Data is subject to the license terms from the original third-party authors. We will always indicate the original source of the data in our documentation, so you should always check the license of any such third-party data before use and redistribution. All visualizations, data, and code produced by Our World in Data are completely open access under the Creative Commons BY license. You have the permission to use, distribute, and reproduce these in any medium, provided the source and authors are credited. Carbon intensity of electricity measures the amount of CO2 produced per unit of electricity.<\/p>\n<\/p>\n
The roughly 110 gigawatts of new battery storage capacity added during the year exceeded the largest-ever annual capacity additions for natural gas. Meanwhile over 12 gigawatts of nuclear power reactors began construction in 2025, amid renewed momentum for nuclear projects in several regions. Most electricity in the U.S. is generated from steam turbines, which can be powered by fossil and nuclear fuels, biomass, geothermal, and solar thermal energy. Other systems such as gas turbines, hydro turbines, wind turbines, and solar photovoltaics are also major generation technologies. Electric utilities in the U.S. generated more than 2,241 terawatt hours in 2024, accounting for just over half of the power output in the country that year.<\/p>\n<\/p>\n
The presence of hot rocks, fluid, and permeability underground creates natural geothermal systems. Small underground pathways, such as fractures, conduct fluids through the hot rocks. In geothermal electricity generation, this fluid can be drawn as energy in the form of heat through wells to the earth\u2019s surface. Once it has reached the surface, this fluid is used to drive turbines that produce electricity. Battery storage, the key to including more renewables in the electricity grid so that power is available when there is no sunlight or wind, is also growing quickly. In 2025, battery costs fell 45 per cent, continuing a long term trend and speeding up the installation of battery storage in grids across the world.<\/p>\n<\/p>\n
NISO said that when total system generation drops significantly, it is required to implement load shedding to safeguard grid stability and prevent system disturbances. In plain language, China is building capacity ahead of demand, which can reflect grid congestion, curtailment, seasonal swings or the lag between construction and full operation. Installed solar capacity reached 1.24 billion kilowatts, up 31.3 % from a year earlier, while wind rose 22.4% to 660 million kilowatts. All data and visualizations on Our World in Data rely on data sourced from one or several original data providers.<\/p>\n<\/p>\n
Emission regulations, such as the Clean Air Act in the United States, set limits on pollutants like sulfur dioxide and nitrogen oxides emitted by power plants. These regulations have led to the retirement of many coal-fired power plants and spurred investment in cleaner energy sources. Carbon pricing, either through carbon taxes or cap-and-trade systems, is another policy tool used by governments to reduce greenhouse gas emissions.<\/p>\n<\/p>\n