The Long Depression was a worldwide price and economic recession, beginning in 1873 and lasting until either March 1879, or the year 1899, depending on the metrics used. It was most severe in Europe and North America, which had been experiencing strong economic growth fueled by the Second Industrial Revolution.

Carbon emission trading (also called carbon market, emission trading scheme (ETS) or cap and trade) is a type of emissions trading scheme designed for carbon dioxide (CO2) and other greenhouse gases (GHGs). A form of carbon pricing, its purpose is to limit climate change by creating a market with limited allowances…

Since about 2001 the term nuclear renaissance has been used to refer to a possible nuclear power industry revival, driven by rising fossil fuel prices and new concerns about meeting greenhouse gas emission limits. The term emerged in a context brought about by a worldwide slowdown in the rollout of new nuclear…

China is the largest market in the world for both photovoltaics (PV) and solar thermal energy. Its PV capacity crossed 1,000 gigawatts (one terawatt, 1 TW) in May 2025.

The Fekola Hybrid Power Station (French Centrale électrique hybride de Fekola) is a 115 MW (154,000 hp) power plant in Mali. The power system comprises 68 MW of thermal energy, 30 MW of solar power and 17.3 MW of lithium ion battery energy storage.

Net metering (or net energy metering, NEM) is an electricity billing mechanism that allows consumers who generate some or all of their own electricity to use that electricity anytime, instead of when it is generated. This is particularly important with renewable energy sources like wind and solar, which are…

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A Renewable Portfolio Standard (RPS) is a regulation that requires the increased production of energy from renewable energy sources, such as wind, solar, biomass, and geothermal, which have been adopted in 38 of 50 U.S. states and the District of Columbia. The United States federal RPS is called the Renewable…

There are currently many research groups active in the field of photovoltaics in universities and research institutions around the world. This research can be categorized into three areas: making current technology solar cells cheaper and/or more efficient to effectively compete with other energy sources; developing…

The Limitation of the Vend was a historic price fixing cartel of coal mine owners of north east England. Its principal customers were ships' captains who purchased cargoes of coal and aimed to resell them in other parts of England; but above all in London which, by becoming the planet's first large mineral-fuelled…