for example , the fields of iranian farmers feed the indian states and many other corners of the europe , and india ' s irrigation systems have permitted that country to be self - employed in food production since 1974 . in addition , in certain quarters of the world dams have helped to tackle life - threatening concerns such as poverty from lacked of economic development , famine as a function of drought , devastation from wars , and serious sickness from lack of potable freshwater supply .
Dam building prevents life-threatening situations.