Clearing smog has led to 'global brightening'
19:00 05 May 2005
NewScientist.com news service
Fred Pearce
The efforts of industrialised nations to cut smog pollution has had a bizarre side-effect - accelerating global warming. New data show that after years of getting smoggier, our skies have become clearer since about 1990. And one effect has been to allow more solar radiation to reach the surface of the Earth.
The phenomenon known as










