Fossil fuel is
Hydrocarbons, primarily coal, fuel oil or natural gas, formed from the remains
of dead plants and animals. Fossil fuel is a general term for buried combustible
geologic deposits of organic materials, formed from decayed plants and animals
that have been converted to crude oil, coal, natural gas, or heavy oils by
exposure to heat and pressure in the earth’s crust over hundreds of millions of
years.
THE ABC FOR SUSTAINABLE CITIES
UNEP / UN HABITAT / FIDIC / GI-REC
