Expat Texan

Garbage in = Garbage out.

It seems to have become somewhat of a game to see who can add in the most creative feedback mechanisms to produce the scariest warming scenarios from their models, but there remains no evidence that the planet behaves in such a manner. Not only is it highly debatable as to whether water vapour acts as a positive or negative feed-back, but what has been observed in laboratories is that CO2 actually has a logarithmic relationship with temperature [i.e. it takes a big increase in of CO2 to produce a small rise in temperature].