The evidence is overwhelming: levels of greenhouse gases in the atmosphere are rising. Temperatures are going up. Springs are arriving earlier. Ice sheets are melting. Sea level is rising. The patterns of rainfall and drought are changing. Heat waves are getting worse as is extreme precipitation. The oceans are acidifying.
The above quote is from What We Know, a new paper (and more) from the American Association for the Advancement of Science (AAAS). It claims that 97% of all climate scientists worldwide are convinced that climate change is real, it is man made, and there are things we can and should do about it.