Why Americans are Skeptical of Their Role in Global Warming

Originally posted by SmokeyTheBear
Yes Muaddib the large portion of this, is most likely normal climate fluxuation that has been happening undisturbed and with relative predictability, constantly keeping itself in check, so climate never got completely out of control, hot or cold.

The climate has been predictable?...sorry but that's not true. If anything the climate and the weather are unpredictable, there are too many natural factors that could change the climate and weather overnight without much warning.

Originally posted by SmokeyTheBear
But now we aare adding a new factor to this delicate balancing act, and although relatively small compared to other factors, those 10 billion tons of greenhouse gasses still add a large enough factor, and one this earth has not been designed to deal with naturally, because for the past 4.2 billion years we have not been a factor.

The Earth has had higher levels of CO2 than now, higher than mankind could ever contribute, and there was no "runaway Global Warming", the Earth didn't become Venus or Mars.

I already presented in another thread evidence from experiments that water vapor contributes to warming more than CO2 ever could.

A mere 5% increase in water vapor levels result in an increase of heat trapping efficiency for H2Ov of 0.7 W/m2. Meanwhile if we more than double CO2 levels and they are raised by 400ppm more, which would make CO2 levels 780 ppm, the increase of heat trapping efficiency for CO2 would increase 0.18 W/m2.

During warming cycles the levels of water vapor increase greatly, and guess what? We have been in a warming cycle 260 years before CO2 levels started increasing.

Originally posted by SmokeyTheBear
P.S your graph has some flaw. because it puts the level 300,00 years ago at 300ppm which it might have been, but puts current at less than 300ppm whichis wrong since they are currently at around 376 ppm

There is no flaw in that graph. It is an older graph.

[edit on 14-4-2007 by Muaddib]