Greenhouse gas emissions and other atmospheric pollution from human causes tend to increase the frequency of drought, the intensity of drought and the maximum duration of drought worldwide. “There has always been natural variability in drought events around the world, but our research shows the clear human influence on drying, specifically from anthropogenic aerosols, carbon dioxide and other greenhouse gases,” said Felicia Chiang, of the University of California Irvine, and now at Nasa’s Goddard Institute for Space Studies in New York. Read More