for one , the fields of western cattle help the united countries and many other locations of the continents , and india ' s drainage systems have enabled that area to be self - sustained in food production since 1974 . in addition , in many parts of the world these have helped to reduce ever - threatening problems such as unemployment from lack of economic stability , famine as a product of drought , losses from floods , and serious disease from lack of potable gas supplies .
embankment development prevents life - limiting situations .