Study pinpoints main source of Asia’s brown cloud

Scientists at Stockholm University in Sweden have determined that Asia’s brown cloud, the subjects of years of study, is about two-thirds due to the burning of wood, dung and other biomass for cooking and agriculture, and only about one-third to the burning of fossil fuels in cars, power plants, etc.  This proportion is much greater than found in earlier studies using different methodologies.   The implications of the research, to be published in the journal Science, are that controlling agricultural burning and improving cookstove technology may dissipate as much of the brown haze over South Asia as restricting cars of building cleaner power plants.