Ozone hole?


  • Anonymous


Evidence for long-term global ozone depletion due to CFCs is still lacking, according to University of Virginia (UVA) scientists, who recently poked a hole in a paper published last November in Science by researchers from the Canadian Atmospheric Environment Service. The UVA scientists, writing in a technical comment also recently published in the journal, took to task the Canadians' claim that because of depletion of stratospheric ozone over populated areas of North America, up to a 35% annual increase in surface ultraviolet radiation occurred over Toronto between 1989 and 1993. According to the UVA scientists, the observation resulted from a poor statistical analysis.