“South Asia has a cloud over its head — an unpleasant, unhealthy and climate-affecting soup of sooty haze that envelops the region, particularly in winter….
Orjan Gustafsson of Stockholm University in Sweden and colleagues have now removed the cloud of uncertainty hanging over the brown cloud. Burning of biomass, they report in Science, is the greater culprit.”
via Study Pinpoints Main Source of Asia’s Brown Air Pollution Cloud – NYTimes.com.