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Global Warming 2
Beginning of essay
Like the glass in a greenhouse, certain gases that occur naturally in the atmosphere tend to trap the sun's heat. This natural "greenhouse effect" helps keep the Earth's average temperature at a comfortable 59° Fahrenheit. Without these greenhouse gases, the Earth would
be about 0° F, like a deep- ....
Middle of essay
....se gas concentrations increasing? Most scientists believe that the burning of fossil fuels and other human's doings is the main reason for the increased rate of carbon dioxide. What has changed in the last few hundred years is the constante release of carbon dioxide by human's. Energy burned to run cars and trucks, heat homes and businesses, and power factories is one of the main reasons for about 80% of todays carbon dioxide problem, about 25% of U.S. methane emissions, and about 20% of global.... |
| Number of words: 845 |
Approximate pages: 4 |
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