"An earlier version of this general effort used language that would forbid reference to models in policy making."
Hi. Math major here. Let me explain something about models.
They are a mathematical simulation of a natural phenomenon.
The test of a model is how well it tracks reality. If if predicts behaviour correctly we can have some confidence in the model.
The error bars of the climate models are 75%. That means a chimp tossing a coin could guess better. You can't make public policy from that.
75% error looks like this: 2 + 2 = 7
The climate models are 25 years old now and with refinements over the years should be pretty good. But they're not, they're so bad you can pretty much throw them out.
Freeman Dyson warned about this:
"Their computer models are full of fudge factors."
http://blog.nj.com/njv_paul_mu...
NASA pointed out they were wrong (and confirnmed Dyson) in 2010.
8th December 2010 13:24 GMT - A group of top NASA and NOAA scientists say that current climate models predicting global warming are far too gloomy, and have failed to properly account for an important cooling factor which will come into play as CO2 levels rise.
http://www.theregister.co.uk/2...
Here's a graph of all the climate models compared to actual temperature measurements. See the divergence?
http://rs79.vrx.net/opinions/i...
"When your hypothesis doesn't agree with nature, it's wrong" - Richard Feynman.