Global Warming Extended Definition Essay The importance of the stratospheric ozone layer, which filters out most of the sun's harmful ultraviolet radiation, in protecting the Earth's surface from the harmful effects of solar ultraviolet radiation has been recognized for many decades. It was not until the early 1970s, however, that scientists began to actually grasp the fact that even relatively small decreases in the stratospheric ozone concentration can have a serious impact on human health--an …showed first 75 words of 1133 total…

…showed last 75 words of 1133 total…is torn between two positions on the cause of global warming. Many believe that carbon dioxide is the reason for the depletion of the ozone and thus global warming. Others believe that sunspots and weather phenomena are to blame. While I support the first view, the necessary movement now is action versus continuing argument over the cause. Action is required so that the severity can be reduced and the impact on humanity can be lessened.