Guwahati rainwater being affected by natural and man-made air pollutants, new study new study reveals
By Sahana Ghosh As rapidly-expanding Guwahati, northeast India’s largest metropolis, gears up to clean its air under the National Clean Air Policy (NCAP), a study suggests a cocktail of natural and man-made pollutants wafting through the air is tinkering with the city’s rainwater quality. Guwahati in Assam is among the 122 ‘non-attainment’ cities identified for implementing mitigation actions under the national policy, which means it does not meet the National Ambient Air Quality Standards. Researchers said pinpointing critical sources of air pollution and their contributions to the problem are essential to crafting effective city and region-specific air pollution control plans. Guwahati city view. Photo credit: Amartyabag/WikimediaCommons. Connecting the dots between the origin of raindrops, the chemical makeup of the rainwater and air pollutants, an IIT Guwahati -led study, from June 2016 to June 2017, shows that 64 percent of the rainfall during monsoon was acidic, which