Christian Science Monitor: Every winter, a heavy haze of pollution envelops many Asian cities.
The smog is a local hazard: Reduced visibility grounded planes in New Delhi in December, while toxic amounts of particulate matter kept Beijing residents indoors several days last month.
New research showing that a component of this pollution also plays a big role in global warming could boost efforts to make air-pollution control in Asia part of the international climate agenda.
A study last month by the International Global...