Parts of India are on track for severe water shortages, according to results from Nasa's gravity satellites. The Grace mission discovered that in the country's north-west - including Delhi - the water table is falling by about 4cm (1.6 inches) per year. Writing in the journal Nature, they say rainfall has not changed, and water use is too high, mainly for farming. The finding is published two days after an...

  KEY TRENDS  • Research studies indicate more erratic and intense monsoon rains/unseasonal rains and hailstorm, increasing risk of droughts and floods and rise in temperature including increased frequency of warm days. This leads to projected average reduction of yield by 6 percent in wheat, 4-6 percent in rice, 18 percent in maize, 2.5 percent in sorghum, 2 percent in mustard and 2.5 percent in potato. The crop yield were projected more...