The suspension of flights in US after the Sept. 11 attacks has provided scientists with a rare chance to improve their analysis of how aviation affects climate. When the air above 25,000 feet is
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/briefly-empty-skies-offer-climate-clues
[2] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change