The Evidence For Human-made Climate Change Is

Our Analysis Shows That, For The Extreme Hot Weather Of The Recent Past, There Is Virtually No Explanation Other Than Climate Change. The Deadly European Heat Wave Of 2003, The Fiery Russian Heat Wave Of 2010 And Catastrophic Droughts In Texas And Oklahoma Last Year [2011] Can Each Be Attributed To Climate Change. The Odds That Natural Variability Created These Extremes Are Minuscule, Vanishingly Small. To Count On Those Odds Would Be Like Quitting Your Job And Playing The Lottery Every Morning To Pay The Bills.

It Has Become Very Difficult For Anyone To Argue That Observed Global Warming Is Natural Variability. We Have Good Reason For Being Able To Say That The World Will Be Warmer By About A Quarter Of A Degree In The Next Decade. It's The Same Reason We Had 10 Years Ago When We Said That The 1990s Would Be Warmer Than The 1980s: The Planet Is Out Of Equilibrium.

We Have Known Since The 1800s That Carbon Dioxide Traps Heat In The Atmosphere. The Right Amount Keeps The Climate Conducive To Human Life.

Recent Warming Coincides With Rapid Growth Of Human-made Greenhouse Gases. The Observed Rapid Warming Gives Urgency To Discussions About How To Slow Greenhouse Gas Emissions.

The 5-year Mean Global Temperature Has Been Flat For The Last Decade, Which We Interpret As A Combination Of Natural Variability And A Slow Down In The Growth Rate Of Net Climate Forcing.