The protective ozone layer in the earth's upper atmosphere has stopped thinning and should largely be restored by mid century thanks to a ban on harmful chemicals, UN scientists said on Thursday.
Earth Sciences
Sep 16, 2010
6
0
It's no secret that the emissions leaving a car tailpipe or factory smokestack affect climate and air quality. Even trees release chemicals that influence the atmosphere. But until now, scientists have struggled to know where ...
Earth Sciences
Dec 10, 2009
1
0
The World Meteorological Organisation said Wednesday that the ozone hole is expected to be smaller in 2009 than a year ago.
Earth Sciences
Sep 16, 2009
0
0
(AP) -- The Obama administration, in a major environmental policy shift, is leaning toward asking 195 nations that ratified the U.N. ozone treaty to enact mandatory reductions in hydrofluorocarbons, according to U.S. officials ...
Environment
Apr 30, 2009
3
0
