- Coal - Wikipedia
Coal Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams Coal is mostly carbon with variable amounts of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen [1]
- COAL中文 (简体)翻译：剑桥词典 - Cambridge Dictionary
Wood and coal are both combustible substances The coal fire had discoloured the paintwork Many miners have suffered from the effects of coal dust in their lungs Wood, coal, oil, petrol and gas are all different kinds of fuel We ordered a hundredweight of coal
- coal是什么意思_coal的翻译_音标_读音_用法_例句_爱词霸在线词典
While fossil fuels – coal, oil, gas – still generate roughly 85 percent of the world's energy supply, it's clearer than ever that the future belongs to renewable sources such as wind and solar
- Coal | Uses, Types, Pollution, Facts | Britannica
Coal, one of the most important primary fossil fuels, a solid carbon-rich material, usually brown or black, that most often occurs in stratified sedimentary deposits, which may later be subjected to high temperatures and pressures during mountain building, resulting in the development of anthracite and even graphite
- 煤炭（固体可燃性矿物）_百度百科
煤炭（coal），是古代植物埋藏在地下经历了复杂的生物化学和物理化学变化逐渐形成的固体可燃性矿物。 煤炭被人们誉为黑色的金子，工业的食粮，它是十八世纪以来人类世界使用的主要能源之一。 煤炭的主要成分是碳，此外还含有氢、硫、氧和氮等元素。
- Coal - National Geographic Society
Coal is a nonrenewable fossil fuel that is combusted and used to generate electricity Mining techniques and combustion are both dangerous to miners and hazardous to the environment; however, coal accounts for about half of the electricity generation in the United States
- What is coal? | U. S. Geological Survey - USGS. gov
What is coal? Coal is a sedimentary deposit composed predominantly of carbon that is readily combustible Coal is black or brownish-black, and has a composition that (including inherent moisture) consists of more than 50 percent by weight and more than 70 percent by volume of carbonaceous material
- Coal - Understand Energy Learning Hub
Form of Energy: Chemical Coal is the most carbon-intensive and dirtiest fossil fuel It is a chemically complex, rock-like hydrocarbon that contains heavy metals (e g , mercury and lead), sulfur, and radioactive material It is a huge contributor to climate change, air pollution, and land disruption Coal is burned to convert chemical energy to
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