Peter Lehner

Peter Lehner (born 1958) is an American lawyer and environmentalist. He leads a sustainable food and farming program at Earthjustice, developing strategies to reduce harmful effects of food production on climate, human health and the environment, and to promote a more ecologically sound agricultural system. He co-authored the book In Deep Water about the 2010 Deepwater Horizon oil spill with Bob Deans.

Lehner received AB degrees in Philosophy and Mathematics from Harvard College and is an honors graduate of Columbia Law School.

Early in his career, Lehner created and led the environmental prosecution unit for New York City Law Department. His cases protecting the city's drinking water laid the foundation for the city's current watershed protection program. Subsequently, he joined NRDC as director of the water program from 1994 to 1999, where he brought attention to the problem of stormwater pollution.

From 1999 to 2006, Lehner served as chief of the Environmental Protection Bureau of the New York State Attorney General's office. He supervised all environmental litigation by and against the state and developed multi-state strategies targeting global warming and air pollution from the nation's electric utilities. Law established in Supreme Court decisions in two of these cases, Massachusetts v. EPA and American Electric Power v. Connecticut, now underlies the Obama administration's Clean Power Plan. Lehner also initiated watershed-wide enforcement programs and led cases addressing invasive species, wildlife protection, and public health.

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