Prob yet another Republican propaganda. It will be too foolish to deny global warming when we can with so much precision measure emissions, calculate their CO2 equivalency and project those numbers to see how it causes rise in global temperature. If anyone has read Millennium Ecosystem Assessment, he/she knows the impacts of anthropogenic perturbation in carbon and nitrogen cycles. One thing that we all need to understand is that, we most of the time look for some specific patterns of change (linear) but environment is different, it often exhibits non-linear and inertial behaviors, which means that even though climate change is happening today and we fear it so much, the consequences might be quite different than that we are expecting. That's why no scientists talk with assertion these days. They speak in language of "potentials" and "scenarios"