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Unformatted text preview: Daniel Steinhoff Prin. Of Bio August 13, 2011 Humans May Affect It but God Planed It Human activity can change our climate. Our affect on the climate comes mostly from our use of fossil fuels. The burning of fossil fuels with the help of other factors like deforestation, which is the removal of the trees from an area of land, has caused the concentrations of heat- trapping "greenhouse gases" to increase significantly in our atmosphere. The U.S. Environmental Protection Agency describes greenhouse gases as gases that trap heat in the atmosphere which increase the global temperature. According to the National Oceanic and Atmospheric Administration and the National Aeronautics and Space Administration, the Earth's average surface temperature has increased by about 1.2 to 1.4F in the last 100 years. If greenhouse gases continue to increase, climate models predict that the average temperature at the Earth's surface could increase from 3.2 to 7.2F above 1990 levels by the end of this century. Scientists surface could increase from 3....
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- Fall '09