(Answers may vary.) Overgrazing by animals can deplete any plant life, resulting in the desertification of an area. Deforestation of the rainforest for agriculture can also lead to desertification as rainforests have very nutrient poor soils. Depletion of available freshwater from aquifers may also cause salinization of these freshwater supplies. Loss of topsoil through erosion results in a loss of agricultural land. Overfishing may result in such a depletion of fish that populations cannot rebound. Loss of biodiversity leads to loss in resources. All of these are ways needed resources are lost, resources which make up the carrying capacity of the earth.
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