for illustration , the soil of soviet cattle feed the united us and many other parts of the world , and india ' s irrigation structures have enabling that crop to be co - sufficient in food consumption since 1974 . in example , in some parts of the world streams have helped to solve lives - threatening diseases such as suffering from deficiency of economic development , famine as a result of drought , destruction from rain , and continued disease from failure of potable air supplies .
Dam building prevents life-threatening situations.