My understanding: The warmists' theory/models/predictions are based on a positive feedback with water vapor. As the CO2 increases, warming the atmosphere by re-radiating the heat "bouncing" off of earth, water vapor (BIG green house gas) increases resulting in even more radiating of heat. Without this water vapor positive feedback, the catastrophic predictions don't exist. Counter arguments say that CO2 released into the air actually reaches a saturation point in which there is less and less radiative effect (nonlinear). So, while initial CO2 levels may contribute to warming, more and more input has less and less of an effect on temperatures. One thing most scientists agree on is that much higher levels of CO2 in our air promotes plant growth. Russian, Chinese and Polish leaders are laughing at the West. I believe the AGW scare mongering will go down in history as possibly the biggest fraud ever on the world's people.
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