- 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 | Uses, Types, Pollution, Facts | Britannica
Coal is defined as having more than 50 percent by weight (or 70 percent by volume) carbonaceous matter produced by the compaction and hardening of altered plant remains—namely, peat deposits
- 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 explained - U. S. Energy Information Administration (EIA)
Coal is a combustible black or brownish-black sedimentary rock with a high amount of carbon and hydrocarbons Coal is classified as a nonrenewable energy source because it takes millions of years to form
- Coal - National Geographic Society
Coal is a black or brownish-black sedimentary rock that can be burned for fuel and used to generate electricity It is composed mostly of carbon and hydrocarbons, which contain energy that can be released through combustion (burning)
- How Coal Forms - The Process and Different Types Explained
Learn how coal forms through natural processes, from plant material to fossil fuel Discover the different types of coal and their unique characteristics
- Coal - Understand Energy Learning Hub
Coal's usage has been on decline in the U S since its peak in 2007, but global coal use has continued to increase, mainly due to high demand in China, India, and Southeast Asian countries
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