... trees and other vegetation remove from the atmosphere in the process of photosynthesis. Ozone depletion is another cause of global warming. The ozone layer shields the Earth from 95 to 99% of the ultraviolet rays from the sun. As the ozone layer is depleted by various causes, more heat energy reaches the surface. The rate at which the surface temperature rises is extremely important. Experts predict that the average surface temperature will rise ... to migrate or perhaps even become extinct. Global warming causes many health risks also. The rise in temperature may increase the risk of v...

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• Grade Level: High School

... fires will dump additional quantities of carbon dioxide into the atmosphere. Changes in temperature and change the composition of the forests. At the present rate of destruction, most of the rain forests will be gone by the middle of the next century. The will allow man-made deserts to encroach on once lush areas. Evaporation rates will also increase and circulation patterns will change. Decreased rainfall in ... cropland could lose topsoil and become man-made deserts. Coastal regions, where half the human population lives, will feel the adverse effects of rising sea levels as the ice cap...

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... . Average global temperatures have risen 1 degree Fahrenheit over the last century. If carbon dioxide and other greenhouse gases continue to spill into the atmosphere, global temperatures could rise five to 10 degrees by the middle of the next century. The warning will be the greatest at the higher latitudes of the Northern Hemisphere, with the largest temperature rises occurring in winter. Most areas will experience summertime highs ... and rainfall brought on by global warming will in turn change the composition of the forests. At the present rate of destruction, most of the rain forest...

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... is another impact of global warming that only adds to the urgency to address it. As the temperature increases, snowcaps and ice begin to melt. The run-off trickles to the nearby seas and oceans, and the sea level rises. Also, since snow reflects back the sun's heat, reduction in snowcaps further increases the rate at which the bare ground absorbs the sun's heat and raises temperatures. This is a cycle that goes on ... and on. In his book 'Global Warming', Michael Anderson states that the IPCC has projected that the artic could have a complete ... ...

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... as water vapor, carbon dioxide, nitrous oxide, and methane, trap energy from the sun. These greenhouse gases allow incoming solar radiation to pass through the Earth's atmosphere, but prevent most of the outgoing infrared radiation from the surface and lower atmosphere from escaping into outer space. The greenhouse effect is important. Without the greenhouse effect, the Earth would not be warm enough for humans to live. But if ... glaciers melt. A glacier is a large sheet of ice that moves very, very slowly. Some melting glaciers add more water to the ocean. Warmer temperatures also mak...

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... that it becomes harder for the radiation that the sun shines into the atmosphere to escape. The heat continues to build up and this is what causes the temperatures to increase. I know this seems like the temperatures increase massively but in the last hundred years the average temperature of the Earth has gone up between 0.8 and 1.0 degrees farenheight. Also in the last fifteen years, we have had the ten warmest years in record ... inches is a huge problem. Sea levels also continue to rise is because the hotter temperature cause the ocean water to expand. An example of the sea level cau...

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• Grade Level: High School