Too many greenhouse gasses in our atmosphere.
What are greenhouse gasses? Water vapor, Carbon dioxcide and methane.
How does the greenhouse effect work?
Here you go (The last part is whats gonna answer your question btw, but its worth reading the whole thing!):
The greenhouse effect is a natural phenomenon, which, as mentioned above, helps maintain the relatively stable, livable, range of temperatures that we find on earth. To better understand how this phenomenon works, scientists have used the analogy of the greenhouse. In a greenhouse, the glass (the atmosphere) allows the radiant energy (light) of the sun to enter. As the radiant energy strikes various plants, gases, and objects in the greenhouse, they heat up. Their heat is then released back into the air of the greenhouse as infrared radiation (heat). This infrared radiation cannot travel through the glass and remains inside the greenhouse, increasing the temperature inside the greenhouse. Temperatures can be controlled, or kept in balance, by allowing some of the heat to remain inside and some to be vented to the outside.
Under normal conditions, the earth's atmosphere works in a similar manner. Solar radiation enters the atmosphere and heats up the air molecules, the surface of the earth, buildings, plants, and other objects. These objects in turn, radiate infrared radiation back out into the atmosphere, where some of this radiation is absorbed by the greenhouse gases, and some is radiated out into space. As some of the heat stays in the atmosphere and some escapes into spaces, a balance is maintained allowing our planet to have a relatively stable range of temperatures.
Scientists believe that as the greenhouse gases become more abundant in the atmosphere, due mainly to the burning of fossil fuels, they retain more and more infrared radiation, allowing less and less to escape into space, tipping the balance toward heating up the atmosphere, resulting in a changing and warmer climate, planet-wide. This is the accelerated greenhouse effect.
So basically the burning of fossil fuels?
Hope I helped!
2007-05-14 18:29:23
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answer #1
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answered by Bri 3
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The Sun, along with volcanic activity. These two tremendous forces have a greater impact than anything Man could generate. Mars is currently experiencing warming, too, though that has gone largely unreported.
The Earth goes through periodic warming and cooling cycles. Somewhere during the Middle Ages, the Earth underwent a warming period, called the Local Climatic Optimum (I think ... you may want to verify the title of the era), during which England had vineyards. Furthermore, archaeological evidence shows taller human beings lived in that era due to greater availability of food.
Later, in the early seventeenth century, the Jamestown settlers experienced harsh winters in what is now the state of Virginia.
The total carbon dioxide in the atmosphere cannot be measured reliably, nor can a "normal" global temperature be established.
2007-05-14 09:30:16
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answer #2
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answered by Anonymous
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in keeping with hazard we've been evolving now. because of the fact for the international warming and different atmosphere pollutants, countless animals have been disappear. And we are able to additionally see some developed animal. desire human can understand what they're doing now. some human beings even think of they have not duty on worldwide warming and atmosphere pollutants.
2016-12-29 04:07:13
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answer #3
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answered by ? 3
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Car exaust
Refrigirator
computers
any electronic item.
But the main reason is the exess CO2 in our environment.
Car sales have tripled over the last 15 years. Gas prices are at a record high!!!
So whaddaya tink???
2007-05-14 08:10:07
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answer #4
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answered by martinpaul2001 3
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Also look at Milankovitch cycles. These deal with variations in the Earth's orbit that can move it farther and closer to the sun over time.
2007-05-14 11:53:32
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answer #5
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answered by Lady Geologist 7
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In my opinion, global warming is a myth. See the book "State Of Fear" by Michael Crichton.
2007-05-14 08:06:10
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answer #6
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answered by Anonymous
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the sun and people
2007-05-14 08:04:17
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answer #7
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answered by Anonymous
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republicans
2007-05-14 08:08:50
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answer #8
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answered by Confused 2
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