David Doniger is director and senior attorney for NRDC's climate and clean air program in Washington, D.C. He first worked at NRDC on clean air issues from 1978 through early 1993, helping to win the international treaty to stop depletion of the ozone layer (the Montreal Protocol) in 1987 and the Clean Air Act amendments of 1990. David left NRDC in 1993 to serve in the Clinton administration, working for a year at the White House Council on Environmental Quality, and seven years as counsel to the head of the Environmental Protection Agency’s (EPA) clean air program, as director of climate change policy, and a U.S. negotiator of the Kyoto Protocol. David rejoined NRDC in 2001 and represented NRDC in a string of climate change cases, including Massachusetts v. EPA -- the landmark Supreme Court decision that greenhouse gases are air pollutants under the Clean Air Act and cases defending California’s clean car standards, EPA’s landmark “endangerment determination” and the EPA’s carbon pollution standards for vehicles. David is working now to assure that the EPA uses its Clean Air Act authority to cut carbon pollution from the biggest sources -- power plants and other key industries -- and to defend this major public health and environmental protection law against assaults in Congress.