For the Full Report in PDF Form, please click here.

[Illustrations, footnotes and references available in PDF version]

On June 23, 1988, a young and previously unknown NASA computer modeller, James Hansen, appeared before a United States Congressional hearing on climate change. On that occasion, Dr. Hansen used a graph to convince his listeners that late 20th century warming was taking place at an accelerated rate, which, it being a scorching summer's day in Washington, a glance out of the window appeared to confirm.

He wrote later in justification, in the Washington Post (February 11, 1989), that "the evidence for an increasing greenhouse effect is now sufficiently strong that it would have been irresponsible if I had not attempted to alert political leaders".

---

Add this page to your favorite Social Bookmarking websites