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NRDC Experts: Climate Change

Climate change is the single biggest environmental and humanitarian crisis of our time. The Earth's atmosphere is overloaded with heat-trapping carbon dioxide, which threatens large-scale disruptions in climate with disastrous consequences. We must act now to spur the adoption of cleaner energy sources at home and abroad. Read more.

David Doniger

Assessing The Impact Of Greenhouse Gas Regulations On Small Business (Part 1 of 2) -- David’s testimony

David Doniger Policy Director, Climate & Clean Air Program

Press Contact:
Bob Keefe
(202) 289-6868

Areas of Focus

Climate policy, curbing global warming, air pollution, depletion of the ozone layer depletion.


David Doniger is policy 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.

Laurie Johnson

Laurie Johnson Chief Economist, Climate Center, Washington, DC, Climate & Clean Air Program

Press Contact:
Jake Thompson
(202) 289-6868

Areas of Focus

Environmental and natural resource economics, cost benefit analysis, economics of climate change legislation, environmental regulation and jobs.


Laurie Johnson is the chief economist at NRDC's climate and clean air program in Washington, DC. Since joining NRDC in 2008, she has concentrated on modeling the costs and benefits of reducing greenhouse gas emissions, the impacts of environmental regulation on employment, economic analyses of regulation by industry, and macroeconomic modeling of climate change legislation and its distributional impacts.

Prior to joining NRDC, she was a professor of economics at the University of Denver for eight years, covering environmental economics, cost benefit analysis, statistics, macroeconomics, microeconomics, and poverty. Articles by Laurie have appeared in peer reviewed journals, including Ecological Economics, the Journal of Economic Behavior and Organization, the Journal of Economic Education, and the Journal of Risk and Uncertainty. Laurie received her Ph.D. in economics from the University of Washington, Seattle.

Briana Mordick

Briana Mordick Staff Scientist, Land & Wildlife Program

Press Contact:
Kate Slusark Kiely
(212) 727-2700

Areas of Focus

Oil and gas production impacts, carbon capture and sequestration.


Briana Mordick is a geologist who serves as a technical advisor on issues related to oil and natural gas extraction and geologic sequestration of carbon dioxide. This work includes the identification of regulatory solutions and industry best practices to address the environmental impacts of oil and natural gas extraction. Prior to joining NRDC, she worked for Anadarko Petroleum for six years as a petroleum geologist on projects including shale gas, tight gas sands, and CO2 enhanced oil recovery. She holds a B.A. in Earth Sciences from Boston University (2002) and an M.S. in Geological Sciences from the University of North Carolina at Chapel Hill (2005).

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