Paper Topic:
Global warming
Running head : Global Warming Keeping It Cool with Global Warming Introduction Global warming is a gradual rise in Earth 's temperature over a given period . Various sources have different opinions and findings as to what exactly is happening to the global climate (1 . One source , the U .S National Research Council , which is a leading science policy body states that currently the Earth 's temperature had been the hottest in the last 400 years . Accordingly , this time span could expand to 2000 years . The rise shown on record was between 0
.3 - 0 .6 degree Celsius over the last century , and the expectation is it would rise more at the end of this century . The warming is attributed to the greenhouse gases that include carbon dioxide and methane accumulated in the upper atmosphere due to human activity such as fossil oil burning , industrial and agricultural activities , and deforestation , whether it is done for farming or logging . Establishments such as Intergovernmental Panel on Climate Change (IPCC ) are claiming it is possible that climate change could have an effect on life on the planet currently , while the problem could get worse in the future since the change could affect the sea level , could introduce desertification and droughts by changing the pattern of precipitation around the globe . In addition , there could be change in agricultural yields , retreating glaciers , some species becoming extinct , and an increase on the vector of diseases
In all this , some are looking at solar variability to be the other contributor to global warming despite the fact that the available measurement covers only 30 years making this assumption unreliable . The Goddard Institute Studies of NASA had concluded that the solar variable increase alone cannot be responsible for the rise in temperature According to its finding , the main culprits are the greenhouse gasses Another establishment the United Nations on its February 2007 report had also concluded that the cause of the global warming is an increase in the amount of carbon dioxide and methane concentration in the atmosphere , mostly created because of human activity (2
No one disputes the existence of the greenhouse effect , which is a natural occurrence and the known greenhouse gasses had a mean warming capability of 33 degree Celsius . Without such a temperature , the Earth will not be inhabitable . The concern recently had been how much human activity has contributed to the elevating of the amount of the gasses in the atmosphere . The other major greenhouse gas , water vapor that causes up to 36-70 percent of the greenhouse effect is more or less out of the control of human beings . Carbon dioxide the other major culprit believed to be the outcome of human activity has between 9-26 percent effect . Methane , which is the outcome of mostly agricultural activity has an effect of between 4-9 percent . The other one the ozone has an effect of between 3-7 percent . The recorded atmospheric concentration of carbon dioxide and methane since the 1750 pre-industrial level has increased by 31 percent and...
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