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This paper discusses the topic of global warming and its effects from the atmosphere and outer space righ tdown to planet earth and its effect on people today and the future This paper was used for an oral presentation then later turned on to be looked over by the teacher he loved it for the layout and the easy to read and understand structure and organization great for oral presentation or an even better 9-10 page paper for any college weatherastrologicalor earth sciences class Climate and Global Warming I An Introduction According to the National Academy of Sciences the Earths surface temperature has risen by about 1 degree Fahrenheit in the past century with accelerated warming during the past two decades There is new and stronger evidence that most of the warming over the last 50 years is attributable to human activities Human activities have altered the chemical composition of the atmosphere through the buildup of greenhouse gases - primarily carbon dioxide methane and nitrous oxide The heat-trapping property of these gases is undisputed although uncertainties exist about exactly how earths climate responds to them II Our Changing Atmosphere Energy from the sun drives the earths weather and climate and heats the earths surface in turn the earth radiates energy back into space Atmospheric greenhouse gases water vapor carbon dioxide and other gases trap some of the outgoing energy retaining heat somewhat like the glass panels of a greenhouse Without this natural greenhouse effect temperatures would be much lower than they are now and life as known today would not be possible However problems may arise when the atmospheric concentration of greenhouse gases increases Since the beginning of the industrial revolution atmospheric concentrations of carbon dioxide have increased nearly 30 methane concentrations have more than doubled and nitrous oxide concentrations have risen by about 15 These increases have enhanced the heat-trapping capability of the earths atmosphere Why are greenhouse gas
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