National Public Radio: It's March. It's freezing. And there's half a foot of snow on the ground. When is this winter going to end?
Many scientists think that climate change might be one cause of this year's snowpocalypse in Boston and bitter cold snaps in New York and Washington.
But physicists at NASA's Jet Propulsion Laboratory have been looking into another culprit: air pollution in China and India.
"Over the past 30 years or so, man-made emission centers have shifted from traditional industrialized countries...