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| Words: 593 | Submitted: 31-Jan-2012
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DescriptionGlobal warming is an increase in the earths temperature due to fossil fuels, industry, and agricultural processes caused by human, natural, and other gas emissions that result in an increased evacuation of greenhouse gases.
Global warming is an increase in the earth's temperature due to fossil fuels, industry, and agricultural processes caused by human, natural, and other gas emissions that result in an increased evacuation of greenhouse gases.
II. Body paragraph #1 - Topic Sentence #1
Greenhouse gases can occur naturally as well as a result of human activities.
Short-wave solar radiation sinks into the Earth's atmosphere and warms its surface while long-wave infrared radiation emitted by earth's surface is absorbed, and then re-emitted by trace gases (Newell 2000). Problems can occur when higher concentrations of greenhouse gases are present in our atmosphere because they have enhanced our earth's heat trapping capability (Newell 2000).
The gases help to warm the surface of the Earth, in which each greenhouse gas absorbs heat differently.
If natural gases did not occur, the temperature of the earth would be considerably cooler.
III. Body paragraph #2 - Topic Sentence #2
Human activities add to the levels of these gasses, causing more problems.
“Automobiles, heat from homes and businesses, and factories are responsible for about 80% of today's carbon dioxide emissions, 25% of methane emissions, and 20% of the nitrous oxide emissions.” (Hansen 2005).
The increase in agriculture, deforestation, landfills, industrial production, and mining contribute a significant share of emissions also.
These gases that are released into the atmosphere are tracked by emission inventories. An emission inventory counts the amount of air pollutants discharged into the atmosphere, in which these inventories are important in studying the effects of global warming on the Earth.
IV. Body paragraph #2 - Topic Sentence #2
It is believed that global warming began since the industrial revolution during the 18th
Human activity since the Industrial Revolution has increased the amount of greenhouse gases in the atmosphere, leading to increases in radiation forces from CO2, methane, troposphere ozone, CFCs and nitrous oxide. The concentrations of CO2 and methane have increased by 36% and 148% respectively since 1750 (Hansen 2005).
During this time heat-trapping gases began to load in the atmosphere, gases such as carbon dioxide and Methane.
These levels are much higher than at any time during the last 800,000 years.
V. Body paragraph #3 - Topic Sentence #3
There are many ways that people can help prevent global warming such as carpooling, auditing the energy in homes, buying fuel-efficient cars, and reducing the electricity used in homes.
Without the help of emissions control policies, carbon dioxide levels are projected to be 30-150% higher than today's levels by 2100 (Leiserowitz, Maibach, Roser-Renouf, & Smith 2011).
The future of emissions damage depends on several factors including but not limited ...
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