On June 23, 1988, NASA Scientist James E. Hansen testified on Capital Hill before the Senate Energy and Natural Resources Committee. Hansen told the Senate committee that global warming was real – and was happening now. One year later, Hansen wrote about this issue along with a group of other contributors in The Challenge of Global Warming, edited by Dean Edwin Abrahamson.
[ad#728x15-link-unit]
To commemorate Hansen’s crucial testimony, we are making the book (or just Hansen’s chapter) available as a free download to help educate people on the effects of global warming, greenhouse gases, and what policy responses are needed to combat what is still the “environmental challenge of our time.” 
From the Preface: Fossil fuel burning, deforestation, and the release of industrial chemicals are rapidly heating the earth to temperatures not experienced in human memory. Limiting global heating and climatic change is the central environmental challenge of our time.
This book summarizes the scientific aspects of the greenhouse effect and climatic change, explains why the issue is important, and shows that there are measures which, if implemented soon, can reduce the social, economic, environmental, and political impact of changing climate.
Click on Links for Download: – The Challenge of Global Warming
[ad#336x280]
