for some , the fields of western fields supplies the united states and all other parts of the world , and india ' s drainage technologies have enabled that country to be self - productive in cereal production since 1974 . in addition , in other parts of the world they have helped to remedy career - limiting problems such as drought from neglect of economic development , famine as a result of hunger , losses from floods , and continued decline from lack of potable water supplies .
Dam building prevents life-threatening situations.