This photo taken on March 18, 2015 shows residents in Bangalore waiting to collect drinking water in plastic pots for their households. A new UN report launched in New Delhi on March 20 ahead of World Water Day on March 22 warned of an urgent need to manage the world's water more sustainably and highlight the problem of groundwater over-extraction, particularly in India and China. The report says global demand for water is increasing exponentially, driven largely by population growth. AFP PHOTO / Manjunath KIRAN / AFP PHOTO / Manjunath KIRAN (Photo credit should read MANJUNATH KIRAN/AFP/Getty Images)
