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The burning of fossil fuels and ________ from nuclear power provide about 86% of the energy used in the world.
Q10: Methane is responsible for about 30% of
Q27: Soil building begins with the physical fragmentation
Q32: A large source of carbon monoxide is
Q36: If trees are removed from a streamside,the
Q37: From an historical perspective,which one of the
Q46: The Comprehensive Everglades Restoration Plan of 2000
Q46: Process whereby plants convert inorganic materials into
Q49: Dealing with current transportation problems of cities
Q67: Land unsuitable for crops may be used
Q69: Method of tilling and planting at right