Effects of Global Warming on Polar Bears

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Global Warming and the Polar Bear Works Cited Missing It was realized that in 1988 that mankind was transforming the atmosphere of our planet (Pearce, 1). Global Warming is a big concern to scientists aside from pollution and is certainly under way. According to the National Academy of Sciences, the Earth's surface temperature has risen by about 1 degree Fahrenheit in the past century, with accelerated warming during the past two decades. Global warming has risen within the last 50 years because of the result of humans activities. These activities have distorted the chemical composition of the atmosphere through the buildup of greenhouse gases – primarily carbon dioxide, methane, and nitrous oxide (EPA, The Climate). What is the cause of global warming and if it serious what is being done to end it. What will be the effects on earth if global warming continues, and last but not least what is occurring around us at this very moment from global warming? Many of these questions are being asked by scientist and are being researched to find more plausible answers and predictions for us. Global warming is found to be caused by the greenhouse effect. The greenhouse effect has been described, by the US Vice President Al Gore, as the potentially most dangerous environmental problem facing mankind, with consequences second only to nuclear war (CS, What is the Greenhouse Effect?). The Green house effect is the process in which gases build up thermal energy in the atmosphere by absorbing infrared radiation (NS, p625). This process is naturally occurring, it has kept the earth warm enough for the humans to keep living. The earth is about 60% warmer than it would be without the greenhouse effect. If greenhouse gasses were not present it would make the earth’s temperature much cooler because fewer rays would be absorbed. If

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