George M. Woodwell
![Woodwell in 2004](https://upload.wikimedia.org/wikipedia/commons/e/ef/George_M._Woodwell_credit_Daniel_Webb.jpg)
He is best known for his work on the effects of ionizing radiation on forest ecosystems, his work to have the pesticide DDT banned from use in the United States, and his work to call attention to the threat of climate change as a result of combustion of fossil fuels. Woodwell was one of the first scientists to sound the alarm about climate change, testifying before Congress about climate change impacts in 1986.
He was a founding board member of the Environmental Defense Fund and the Natural Resources Defense Council. Provided by Wikipedia