Scientists have proven, with numbers, that greenhouse gases are mostly responsible for global warming. Here are the calculations, short and (very) long versions. The long has reams of detail and hundreds of references.
http://www.globalwarmingart.com/wiki/Image:Climate_Change_Attribution.png
http://ipcc-wg1.ucar.edu/wg1/wg1-report.html
summarized at:
http://www.ipcc.ch/SPM2feb07.pdf
Increased radiation from the sun, volcanoes, or "natural cycles" can't explain most of global warming. The numbers don't work. Greenhouse gases can explain most of it.
Skeptics debate. But scientists calculate. Which is why almost every scientific organization accepts man made warming as fact.
Note this, especially the crucial word "quantitative".
"There's a better scientific consensus on this [climate change] than on any issue I know... Global warming is almost a no-brainer at this point,You really can't find intelligent, quantitative arguments to make it go away."
Dr. Jerry Mahlman, NOA
2007-06-19
09:09:13
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Bob
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