U.S. Science Adviser Holdren says Administration Remains Committed to Comprehensive Energy and Climate [Hoax] Legislation | WWF Climate Blog

2. "The main cause of these changes in climate is human activity, above all the combustion of fossil fuels and secondarily tropical deforestation and other land use change. The evidence [what evidence, specifically?] for the dominance of the human role in what we are experiencing is powerful and I think it should be persuasive to anybody not blinded by wishful thinking who looks at that evidence carefully."