for example , the soils of rural producers fed the united states and many other parts of the world , and india ' s sanitation systems have enabled that crop to be over - adequate in crop processing throughout 1974 . in addition , in many parts of the earth dams have failed to remedy life - threatening problems such as problems from inadequate of rural development , floods as a result of drought , devastation from floods , and continued plague from lack of drinkable food supplies .
Dam building prevents life-threatening situations.