Fossil fuels include crude oil, natural gas, hard coal and lignite. These energy sources were formed many millions of years ago from dead plants and animals and today often lie deep beneath the earth’s surface. To obtain energy from them, the...
Fossil fuels include crude oil, natural gas, hard coal and lignite. These energy sources were formed many millions of years ago from dead plants and animals and today often lie deep beneath the earth’s surface. To obtain energy from them, the...