CO2 is 30% higher than it has been for 650,000 years. Methane is 130% greater. These are two of the main pollutants humans put into the atmosphere in excess, and they are two of the primary greenhouse gases.
Look at the 'hockeystick', which shows a dramatic warming since 1950 after a fairly stable climate for 1000 years. In fact, the 10 hottest years in recorded history have all happened since 1990, with 2005 being the hottest, and 2006 is shaping up to maybe break that record.
(see links below)
How's that for proof of man's fault in this? There is ample proof, any real scientist will tell you that.
There has NEVER been an article doubting man's influence on global warming published in a peer-reviewed journal. A recent study of almost 1000 proved that.
Yes, the earth naturally heats and cools, but the rate and amount we are warming now is unprecedented in the recent geologic past. We are doing this, and we must stop it. This is not some political statement or rhetoric. This is science trying to educate a crass, ignorant public of the damage they are doing. The magnitude of temperature increase ALREADY is about 10x that of the 'little ice age' of the middle ages, and rate and amount are only going up.
Just to be clear, glacial and interglacial cycles are mainly controlled by astronomical fluctuations, but we have a detailed record of the last 7 cycles, and what the climate and CO2 is doing now is way different and extreme. The rate of increase is much higher than in the past AND the value itself is much higher.
HI CO2:
http://news.bbc.co.uk/1/hi/sci/tech/4467420.stm
HOCKEY STICK:
http://news.bbc.co.uk/1/hi/sci/tech/5109188.stm
General climate stuff:
http://news.bbc.co.uk/1/hi/sci/tech/3897061.stm
2006-09-25 10:21:06
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answer #1
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answered by QFL 24-7 6
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Global warming is the observed increase in the average temperature of the Earth's atmosphere and oceans in recent decades.
The Earth's average near-surface atmospheric temperature rose 0.6 ± 0.2 °Celsius (1.1 ± 0.4 °Fahrenheit) in the 20th century. The prevailing scientific opinion on climate change is that "most of the warming observed over the last 50 years is attributable to human activities"[1].
The increased amounts of carbon dioxide (CO2) and other greenhouse gases (GHGs) are the primary causes of the human-induced component of warming. They are released by the burning of fossil fuels, land clearing and agriculture, etc. and lead to an increase in the greenhouse effect. The first speculation that a greenhouse effect might occur was by the Swedish chemist Svante Arrhenius in 1897, although it did not become a topic of popular debate until some 90 years later.
An increase in global temperatures can in turn cause other changes, including a rising sea level and changes in the amount and pattern of precipitation. These changes may increase the frequency and intensity of extreme weather events, such as floods, droughts, heat waves, hurricanes, and tornados. Other consequences include higher or lower agricultural yields, glacial retreat, reduced summer streamflows, species extinctions and increases in the ranges of disease vectors. Warming is expected to affect the number and magnitude of these events; however, it is difficult to connect particular events to global warming. Although most studies focus on the period up to 2100, warming (and sea level rise due to thermal expansion) is expected to continue past then, since CO2 has an estimated 50 to 200 year long average atmospheric lifetime [4]. Only a small minority of climate scientists discount the role that humanity's actions have played in recent warming. However, the uncertainty is more significant regarding how much climate change should be expected in the future, and there is a hotly contested political and public debate over what, if anything, should be done to reduce or reverse future warming, and how to deal with the predicted consequences.
2006-09-25 01:45:20
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answer #2
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answered by Anonymous
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Global warming has been occuring since the end of the last ice age some 10,000 years ago. There is a pseudoscience that has become chic of late that global warming is caused by humans. The temperature seems to have increased by about a degree in the last century. Scare mongers on the left have seized on this as a way to control industry. Before, the scare was global cooling and we are all going to die because the ice age is coming. It seems that industry is always the problem and reducing industry or socialism is always the solution.
2006-09-25 04:45:01
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answer #3
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answered by JimZ 7
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Yes, global warming!
2006-09-25 01:45:37
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answer #4
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answered by Anonymous
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YES... global warming!!!! Even if we want it or not ..it is here, and it gets stronger every day!!!...
Some "Humans" are just so absorbed about other "more" important issues such as war and auto-destruction ...that do NOT have time to be thinking about the REAL important ones like healing our home...our planet!!!!
I think that if we are real "humans" we SHOULD care about ourselves and everything around us.... beginning with this real and latent global problem..... if we don't fix it it would be like killing ourselves....!!! :(
2006-09-25 03:35:54
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answer #5
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answered by Anonymous
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What about global warming? We need to get our act together and stop it!
2006-09-25 01:43:34
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answer #6
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answered by suz' 5
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a friend of mine pointed out that global warming could all be a theory. the temperatures seem to be decreasing while the rate of carbondioxide is increasing...
2006-09-25 02:25:29
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answer #7
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answered by amber 2
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Im not really sure whats going on .
It seems to me the more compounding the threat becomes .
The less society wants to know about it.
I think we are all deliberatly ignorant.
The human race seems to be apathetic towards it's own demise.
2006-09-25 01:46:28
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answer #8
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answered by kevin d 4
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Many scientists convulse audibly at the use of this term. they prefer to say "climate change" partly because it is less controversial but mostly because it is somewhat more accurate a description...
2006-09-25 05:42:21
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answer #9
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answered by Anonymous
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we all need to shack up our politicians. and make them start doing the right things, make them start to do what we want, not play school girls. they are just being silly little girls. get with the picture leaders . WAKE UP NOW before its to late.
2006-09-25 02:50:51
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answer #10
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answered by jane_sutherland1966 2
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