There are minerals that have been formed in the lithosphere over millions of year and constitue a closed system.These non-renewable resources,once used,remain on Earth in different form and,unless recyled propety,become waste meteial
Non-renewable resources include fossil fuels such as oil and coal,which if estracted at the present rate,will soon be totally used up .The end products of fossil fuels are in the form of heat and mechanical energy and chemical compounds,which cnanot be reconstituted as a resource.
Wednesday, September 2, 2009
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