Yes. Geologists have discovered, by looking at rock samples from deep underground, that the Earth has been through many cycles of global warming and ice ages. We just happen to be going through a phase of hot climate. This is not necessarily because of human interference. We cannot tell, because we don't know how much warming there should be.
2006-09-08 04:39:57
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answer #1
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answered by pinuts 2
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There are cycles, and yes, we are gradually warming as we are still coming out of the "little ice age" of the 17th century.
However, the rate of change has speeded up significantly in the past 150 years or so. This incidentally is about the same time as we became industrialised and started burning fossil fuels. the rate of change has become faster again over the past 20 or so years; since the car became king. There is as yet no definitive answer, but my money would be on global warming being excascerbated by human action.
2006-09-06 15:16:41
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answer #2
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answered by Paul D 2
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There is a sequence of warming and cooling recorded over many thousands of years by analysing ice cores from the greenland ice sheet. However, the rate of warming currently being experienced is by far greater than anything recorded in these records, it is only when you then compare the a graph showing the increase in the use of fossil fuels over the years and compare that with the current rise in temperature that the two graphs match. It is for this reason that virtually all the scientific community (except for those directly funded by oil companies to argue the case) believes that CO2 is the direct cause of global warming.
2006-09-06 14:23:36
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answer #3
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answered by wolfie 2
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It is true the earth has cycles of climate that can alter the temperature, but these are much slower than the warming we are seeing at the moment.
The most widely accepted theory is that global warming is being caused by more CO2 in the atmosphere because of human activity, and evidence for this can be very easily given by the close correlation between carbon dioxide levels in the atmosphere and global temperatures, seen here:
http://en.wikipedia.org/wiki/Image:Co2-temperature-plot.png
2006-09-07 12:04:51
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answer #4
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answered by Anonymous
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The temperature of the earth has increased 0.6 degrees centigrade in the past 100 years. Warming is a result of two components:
1) natural cycles - distance from the sun, tilt of the earth, and wobble of the earth in its orbit
2) greenhouse effect of gases such as water vapor (largest effect) and carbon dioxide.
The exact breakdown between natural cycles and man made effects has not yet been determined, but much research is underway to achieve the answer.
2006-09-06 16:34:01
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answer #5
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answered by Jim P 2
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Ice ages tend to go in 26,000 year cycles due to the precession of the earth's orbit. So, yes, global cooling and global warming is cyclical. But not this one. We should be in an period of global cooling now. Instead the earth is getting warmer. This one is caused by greenhouse gases.
2006-09-06 14:26:14
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answer #6
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answered by Kitiany 5
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Yes but the changes are coming so soon....
its not only global warming but also the rate of evaporation has changed which has changed the time table for rain...giving birth to epidemics and famine.
I believe everything has to go back to its evolution.
Cheers
2006-09-07 05:56:18
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answer #7
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answered by JUDEdaObscure 1
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Yes, we are comming out of an ice age - when the staturation point comes ie. fresh water into sea water the seas will refreeze over and we will be into another ice age - i hope i've spent my pension by then
animals create more global warming than humans and the sea absorbs more than the trees
2006-09-06 17:25:30
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answer #8
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answered by havantascooby 3
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There are cycles, but these tend to take thousands of years. The changes we are seeing now are happenning in decades.
2006-09-06 14:12:03
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answer #9
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answered by Peakey 3
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It IS a natural process, BUT it has been elevated by humanity.
2006-09-07 11:22:36
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answer #10
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answered by Anonymous
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