Farmers in these countries don't need much income since they grow their own food. The rich land-owners don't need much money from agriculture since they have other sources of income. The developed world's food gifts subsidize the farmers. A and C are correct 20. A difference between a resource and a reserve is a. Resources include both materials that can be utilized economically today and those that are currently too expensive for use.
Resources are smaller in quantity than reserves under most conditions.
Reserve includes only those materials than can be currently utilized under present day economic conditions. A and D are correct. Lowering of the ground water surface around a pumped well. When water flows into the ground from infiltrating rain. Reduction of ground water recharge in an aquitard.