Soil erosion is reducing the amount of land available for crop production. Salinization, a result of irrigation, is deminishing soil capacity for crop production. Urbanization, expanding cities spilling over onto adjacent farm land, also permanently removes farm land from the inventory. As we accelerate use of fossil fuels, we produce more pollutants, deplete the ozone layer, and risk global warming. These events contribute to the decrease in our food production capability.
Air pollution causes heath hazards, and decreases food production capacity.
Global warming, droughts and floods. Global warming causes climate changes that dramatically affect food producing areas, through both floods and drought. Ozone protects us from harmful solar radiation. Thinning of that layer exposes humans and crops to damaging radition. We are polluting our natural waters faster than the natural processes can purify them.