100% CO2 Emissions Cut in US - by 2020

...is not a science, but a political football. The nature of the laboratory is...NATURE, and not only is it not nice to fool Mother Nature, it is impossible to do controlled, reproducible experiments with Mother Nature. Thus, one must depend on assumptions and computer modeling, i.e., non-objective methodologies that are subject to one's agenda in the process. In short, if you are an idiot, climatology is a good field into which to go and make a name for yourself. Hardly anything is verifiable, and you can scare the begeebees out of everyone just for fun!