Why are coal and petroleum non-renewable resources?

Coal and petroleum are produced by constant high pressure of earth’s crust and upper soil,this pressure acts upon the the fossils and residues of animals & plants over millions of years producing petroleum & coal deposits.Thus once mined/oil drilled they can never be used again,as the waiting period for formation of coal & petrol is very high compared to a human life thus coal & petroleum are called non-renewable. read more

Nonrenewable energy sources come out of the ground as liquids, gases, and solids. We use crude oil to make liquid petroleum products such as gasoline, diesel fuel, and heating oil. Propane and other hydrocarbon gas liquids, such as butane and ethane, are found in natural gas and crude oil. read more