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Heavy use of wood during early civilization led to shortages of trees.
Q1: In 1962,Rachel Carson published Silent Spring,which dramatized
Q10: Which one of the following is likely
Q10: Which one of the following government actions
Q10: Which one of the following choices involves
Q21: Species are more likely to become extinct
Q24: There is very little that a person
Q59: The sex ratio of a population is
Q61: A primary function of fertilizer is to
Q68: Among plants,a condition that results in an
Q73: Which biome is characterized by organisms that