Global Warming

Essay specific features

 

Issue:

Science

 

Written by:

Charles G

 

Date added:

May 1, 2017

 

Level:

University

 

Grade:

B

 

No of pages / words:

3 / 713

 

Was viewed:

9157 times

 

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Essay content:

The gases--water vapor (H2O), carbon dioxide (CO2), and methane (CH4)--keep ground temperatures at a global average of about 15 degrees C (60 degrees F). Without them the average would be below the freezing point of water. The gases have this effect because as incoming solar radiation strikes the surface, the surface gives off infrared radiation, or heat, that the gases trap and keep near ground level...
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The effect is comparable to the way in which a greenhouse traps heat, hence the term. Environmental scientists are concerned that changes in the variable contents of the atmosphere--particularly changes caused by human activities--could cause the Earth's surface to warm up to a dangerous degree. Since 1850 there has been a mean rise in global temperature of approximately 1° C (approximately 1...
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