[[Environmentalist]]s also complain that increased [[irrigation]] for crops has led to a depletion of ground [[water]] and an increase in the salinity of the [[soil]], thus harming [[soil fertility]]. Many ground wells in the [[United States]] may be [[pollution|polluted]], though usually from [[hazardous waste]] (such as dumped [[oil]]) rather than from fertilizers or pesticides. | [[Environmentalist]]s also complain that increased [[irrigation]] for crops has led to a depletion of ground [[water]] and an increase in the salinity of the [[soil]], thus harming [[soil fertility]]. Many ground wells in the [[United States]] may be [[pollution|polluted]], though usually from [[hazardous waste]] (such as dumped [[oil]]) rather than from fertilizers or pesticides. |