Pollution Causing Global Dimming Those concerned about global warming may have something else to worry about. It's called global dimming, and it's caused by suspended particles of pollution in the atmosphere that block the sun's rays.
NPR logo Pollution Causing Global Dimming

Pollution Causing Global Dimming

Those concerned about global warming may have something else to worry about. It's called global dimming, and it's caused by suspended particles of pollution in the atmosphere that block the sun's rays.