However, these dams have also increased the spread of bilharzias is—a debilitating waterborne disease also known as snail fever—an unintended consequence. New varieties of seeds associated with the...

However, these dams have also increased the spread of bilharzias is—a debilitating waterborne disease also known as snail fever—an unintended consequence. New varieties of seeds associated with the green revolution of the late 1950s and the 1960s increased the yield of food grain, reduced hunger, and eliminated famine from India and large regions of Asia.