BY 2020, more than 30 million people living in just four Asian cities could be reeling under sulphur pollution levels far in excess of WHO safety limits. But efforts to cut sulphur emissions could cost an astounding $87 billion a year.
Asia is urbanising rapidly. By 2025, approximately 3 billion people are expected to be living in urban areas, fuelling demand for power plants, cars, domestic heating, and small-scale industries – all of which spew sulphur dioxide into the atmosphere.
To determine current levels of sulphur pollution, Gregory Carmichael at the University of Iowa’s Center for Global and Regional Environmental Research…
