I can't find the site with the numbers, and on a general scale volcanic gasses are only contributing a limited amount of co2 and so2 into the atmosphere. However, ONE major supervolcanoe errupting can spew enough gasses into the atmosphere to cause a global "nuclear winter" and it would happen in a matter of hours or days. There is nothing short of nuclear war that humans could do that would contribute that much in that short a timespan. As it stands, we are adding more than volcanoes, but that goes without saying. ONE major volcanic erruption on the scale of vulcanism as it was even hundreds of thousands of years ago would have much more drastic effects. The most important point I was making, however, was that humans are NOT the cause, simply a contributor in a negative way to the overall cycle. We can speed up the process (to a VERY limited extent), but eventally planet earth will find it's temperature cap, and the trend will go colder, not hotter. Remember, the earth is a closed system, these processes have been going on since long before man was here, and they will continue when we are gone.
There are a lot more factors involved than just carbon dioxide in global warming.. This site has a crash course on causes of climate change:
http://www.physicalgeography.net/fundamentals/7y.html
Water vapor is more of a contributor to global warming than even carbon dioxide, and this isn't something we can't neccessarily control. In fact, scientists are happy to state that water vapor is the NUMBER ONE "greenhouse gas" and the one that really gets the rest of the ball rolling.
http://news.nationalgeographic.com/n...0_warming.html
http://www.nov55.com/ntyg.html
http://www.john-daly.com/artifact.htm
I say again, we should be doing what we can to stop pollution, but to stay that humans are the sole cause of it and to fool people into thinking they can make the process stop happening is ridiculous. We can stop pollution tomorrow and the cycle will still happen, maybe a little more slowly (by a year or two?), but it is inevitable. I don't believe in lying to people to make them do what you want them to... Governments and religion do it all the time. Wouldn't it be nice though, to live in a world where people told you the REAL problems instead of the ones they want to manipulate you with? :)
