People also ask
Where does the energy in coal come from?
The energy in coal comes from the remains of prehistoric plants and animals, making it part of the fossil fuels family. Coal formation began during the Carboniferous period (280 to 345 million years ago).
What are the main components of coal?
It is composed mostly of carbon and hydrocarbon s, which contain energy that can be released through combust ion (burning). Coal is the largest source of energy for generating electricity in the world, and the most abundant fossil fuel in the United States.
What type of rock is coal?
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 hydrocarbon s, which contain energy that can be released through combust ion (burning).
Why is CO2 coal classified as a nonrenewable energy source?
Coal is classified as a nonrenewable energy source because it takes millions of years to form. Coal contains the energy stored by plants that lived hundreds of millions of years ago in swampy forests. Layers of dirt and rock covered the plants over millions of years. The resulting pressure and heat turned the plants into the substance we call coal.