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those resources that take a geological age to form or are not reusable and renewable
(also called mean) the sum of a set of quantities divided by the number of quantities in the set...
(also called a water cycle) the cycle of evaporation and condensation that controls the...
rain that is produced by strong convection currents in the atmosphere; rain that is caused by...
a scheme whereby water from one river system is moved to another river basin where less water is...