Peter Frumhoff

Director of science & policy

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Peter Frumhoff is a global change ecologist and serves as chief scientist for the UCS climate campaign. Dr. Frumhoff is an internationally-recognized expert on climate change impacts, climate science and policy, tropical forest conservation and management, and biological diversity. He holds a Ph.D. in Ecology. See Peter's full bio.

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As Typhoon Melor threatens the Philippines, a Filipino boy prepares a fishing net. Photo: Francis R. Malasig/EPA

Holding the Fossil Fuel Industry Accountable: What We’ve Done and Must Do in the Wake of Paris

As we celebrate the landmark Paris Agreement and the momentum it creates for accelerating the pace of clean energy adoption and climate preparedness in the U.S. and internationally, the Union of Concerned Scientists (UCS) will also keep working to ensure that the fossil fuel industry does not stand in the way of needed progress.

Building on our successful efforts earlier this year to motivate BP and Royal Dutch Shell to leave the climate-science-denying American Legislative Exchange Council, here are a few recent outcomes from our climate accountability campaign: Read more >

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Energy, Climate Experts Call on Presidential Candidates to Lay Out Their Plans for Clean Energy Leadership

I’m writing from the Paris climate negotiations to share with you some exciting news:

Today, 74 of our nation’s leading clean energy and climate experts have released a letter  urging U.S. presidential candidates to “endorse and build upon the U.S. commitments at the international climate Conference of the Parties (COP21)” and “put our nation on a path to a vibrant economy free of carbon pollution by mid-century.”  Signers of the letter include Nobel Laureate and former Secretary of Energy Steven Chu, climate scientists Katharine Hayhoe and Chris Field, environmental justice expert Robert Bullard, and former Assistant Secretary of State and climate and business policy leader Eileen Claussen. The letter was organized by the Union of Concerned Scientists on behalf of the signers. Read more >

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Exxon’s Early Knowledge of Climate Risks, Their Long Campaign of Climate Deception and Why It Matters

Internal Exxon memos recently brought to light through meticulous investigative reporting by Inside Climate News (ICN) show that senior company executives knew by 1978 that emissions of carbon dioxide from fossil fuels posed significant risks of disrupting the climate. Read more >

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Fossil Fuel Firms Are Still Bankrolling Climate Denial Lobby Groups

BP has withdrawn support to ALEC, a group known for misrepresenting climate science, but appearances can be deceptive. Oil, gas and coal companies remain firmly behind climate disinformation campaigns. Read more >

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Reflecting Sunlight to Cool Earth: The NAS Weighs Controversial Measures in New Report

The president’s science advisor John P. Holdren has often observed that humanity has three basic options for dealing with climate change: Mitigation (reducing heat-trapping emissions), adaptation (coping with unavoidable impacts of climate change), and suffering.  The more swiftly we both mitigate and adapt, the less suffering we endure and impose on future generations.

Suppose, however, that we falter and temperatures continue to rise to dangerous levels. In a climate emergency, facing high risks of major and otherwise unavoidable impacts, should the U.S. or other governments consider forced cooling of Earth by injecting reflecting aerosol particles into the stratosphere? Read more >

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