ECONOMICS (CBSE/UGC NET)

Detailed explanation-1: -According to one estimate, about 70 percent of the world’s freshwater is used for agriculture. Farmers around the world use irrigation to transport water from surface and ground water sources to their fields.

Detailed explanation-2: -India has 18% of world population, having 4% of world’s fresh water, out of which 80% is used in agriculture.

Detailed explanation-3: -The main sources for irrigation water are groundwater from wells, surface water, drainage ponds, rain and municipal water. Drilled wells are a clean source of water for many greenhouse operations however, the water yield from drilled wells is usually limited.

Detailed explanation-4: -Ice sheets, ice caps, glaciers, icebergs, bogs, ponds, lakes, rivers, streams, and groundwater are the sources of freshwater.

Detailed explanation-5: -Surface water. Rivers, streams, and irrigation ditches. Open canals. Impounded water such as ponds, reservoirs, and lakes. Groundwater from wells. Rainwater. Locally collected water such as cisterns and rain barrels.