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those energy sources that are not used up but are replenished in a cycle: wind; solar; water; waves; biofuels.
central bank policy as regards money supply; interest rates and inflation.
the quantity of output of goods and services produced by the workers in a certain time.
the quantity of a type of product that consumers buy at a certain price at a certain time.
the reduction in the quality of the land; the vegetation cover and soil moisture caused by the...