US Haze From Canada Fires Rare And Extreme Event: Expert

The air pollution swamping the northeast United States this week from smoke spewed by fires in Canada is "exceptionally rare" and "extreme", said Ryan Stauffer, a NASA scientist specializing in air pollution. This episode should last for at least the next two days, the expert told AFP on Wednesday. "In the last 20 or 25 years, the only event that comes even close to what we're seeing in the past few days was a very similar situation on July 7 and 8, 2002. "And that was... maybe even an eerily...