Global Warming
Over the last one hundred years global temperaturehas increased between 0.6 and 1.1 degrees Fahrenheit,glaciers over the world have decreased in size andworldwide sea level has risen 10 to 20 centimeters.(Global Warming Opposing Viewpoints) Are these changesdue to human behavior or natural causes? Is globalwarming a threat to the world environment? Globalwarming is a complex issue where scientists on bothsides of the subject have a valid point of view. The green house effect is causing the earth to getwarmer. But why is the earth getting warmer, what iscausing global warming? What can we do to fight globalwarming or why don't we need to worry about it? Theseare some of the questions many people are asking. The earths atmosphere acts like a green house keepingthe world at a very livable temperature, of about 60Fbut to many green house gasses such as carbon dioxide,methane, and nitrous oxide are building up in theatmosphere, holding to much of that extra heat andcausing global temperature to rise. The solar energypasses through our clear atmosphere where most of theenergy is absorbed by the earth, keeping it warm butthe energy that the earth does not absorb is reflected
Climate models show thatglobal warming will have the biggest change at highlatitudes, especially in the Arctic where reductionsin sea ice and snow cover are expected to lead to thegreatest relative temperature increases. Scientistsare currently unable to determine which parts of theUnited States will become wetter or drier, but thereis likely to be an overall trend toward increasedprecipitation and evaporation, more intenserainstorms, and drier soils. Scientistsbelieve the increase of carbon dioxide is due to thecombustion of fossil fuels and other human activities. Here is a diagram of the greenhouse gas emissions percapitaIn the world today (http://www. Butwith that said still many scientists think that theincreased concentration of methane is not a cause ofglobal warming but a consequence. If people don't start to take actionsoon enough it will be to late. Theysay the shift could be almost 200 miles to the north. Most of the United States is expected to warm,although some areas may have less warming. (Needs a reference) The global temperature rise will also affect themountain ranges that cover 20 percent of the Earth'ssurface. Global warming is a threat to the environment andactions must be taken to learn more and help preventglobal warming. pdf) Scientists also think that global warming may shiftthe ideal range of the North American forests. It could also affect human health, animals,and many types of ecosystems. gov/globalwarming/emissions/individual/index. Emissions perperson have increased 3. Ice and snowcool the climate by reflecting solar energy back tospace, so a reduction in them would lead to greaterwarming in the region.
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Acceptance Essays
