Only In The Last Few Years Did

Injection Of Environmental And Political Perspectives In Midstream Of The Science Discussion Cannot Help The Process Of Inquiry. I Believe That Persons With Relevant Scientific Expertise Should Concentrate, With Pride, On Cool Objective Analysis, Providing Information To The Public And Decision-makers When It Is Found, But Leaving The Moral Implications For Later Common Consideration, Or At Most For Summary Inferential Discussion.

The Last Time The World Was Three Degrees Warmer Than Today-which Is What We Expect Later This Century-sea Levels Were 25m Higher. So That Is What We Can Look Forward To If We Don't Act Soon.

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

We Are On The Precipice Of Climate System Tipping Points Beyond Which There Is No Redemption.

Several Times In Earth's History, Rapid Global Warming Occurred, Apparently Spurred By Amplifying Feedbacks. In Each Case, More Than Half Of Plant And Animal Species Became Extinct. New Species Came Into Being Over Tens And Hundreds Of Thousands Of Years. But These Are Time Scales And Generations That We Cannot Imagine.