I don't get this... how can there be so many people on FR that buys this crap?
No one that I know of has said "no warming". If we doubled CO2 we would get +1.2 deg C not anything close to the alarmist are stating.
We also know CO2 levels has been at very high levels and tempature was in an ice age and it was the other way around as well.
No one can predict the weather.
I assume you are just kidding here.
Predicting "global warming" or "the greenhouse effect" (or whatever) isn't like predicting weather anyway. It's like pointing that summers are hotter than winters on the average. Or predictin that July 2050 will be mostly warmer (in New York City) than January 2051.
Only from CO2. Positive feedbacks can increase the warming, negative feedbacks can decrease it. While increasing water vapor is a definite positive feedback, clouds could be strongly positive, weakly positive, neutral, weakly negative, or strongly negative -- and that's a critical area of research right now.
There's a small handful of prosletyzers. The people who know the science are tired of arguing with them because the alarmists are like jello. You push them decisively on one point and they'll go off on another thread and push some other point. Most of their points are copied from people with an agenda.