Web. 19 May 2014. • "Global Warming Solutions | UCSUSA." Union of Concerned Scientists. N.p., n.d.
The greenhouse effect keeps the earth’s temperature at a life-sustaining level. Humans influence the greenhouse effect by allowing too many greenhouse gases to trap heat in the atmosphere. With the over-abundance of greenhouse gases, the earth heats up at a rate that is unnatural and is potentially dangerous to the environment and all those who inhabit it. As stated in the Encyclopedia of Global Warming and Climate Change, Velma I. Grover provides a statistic saying that there has been an increase of thirty-one percent of carbon dioxide (CO2), 151 percent increase of methane (CH4), and a seventeen percent increase of nitrous oxide (N2O) since 1750 (470-73). Such significant increases in these greenhouse gases provide ev... ... middle of paper ... ...hication of U.S. freshwaters: analysis of potential economic damages.
Some people do not believe that this phenomenon is really happening. Based on the facts, it really is happening. The surface of the Earth is warming rapidly and humans are a main cause. This paper is about global warming, the causes of it, the changes in climate on Earth, and the potential dangers of it. Global warming is the phenomenon of the rising average air temperature near the Earth’s surface over the last couple of centuries.
The gases are emitted mainly by cars, power plants, and other industrial sources that burn gasoline, coal, and other fossil fuels. Obviously, the emissions of these greenhouse gases in excess are leading to the planet’s consistent increase in temperature. For example, in a study conducted by the National Center for Atmospheric Research, it was confirmed that earth’s early century warming was caused by mostly solar and volcanic forcing, and the late century warming, from 1940-2000, was mostly caused by the increase of greenhouse gases. The National Resource Defense Council states, if global warming persists, there will be more air pollution and problems with water supplies as precipitation patterns change, as well as huge threats to ecosystems from the Everglades to the glaciers. Not only will there be hotter, longer heat waves and more intense storm systems, but also forests, farms and cities will face troublesome new pests and more mosquito-borne diseases.