Expert Testimony

Oppenheimer speaking
Photo by Frank Wojciechowski
Dr. Oppenheimer has provided expert testimony in a number of U.S. Congressional hearings over the last several decades. Below are selected recent testimonies, plus one that may be of historical interest.


  • March 12, 2021: Testimony before the Committee on Science, Space, and Technology, U.S. House of Representatives, The Science Behind Impacts of the Climate Crisis. Oppenheimer_testimony_2021.pdf


  • April 9, 2019: Testimony before the Subcommittee on Environment: Climate Change, The History of a Consensus and the Causes of Inaction, U.S. House of Representatives. A video of Dr. Oppenheimer's testimony is available on YouTube (Testimony from minute 55:18 to 1:04:17; Oppenheimer and representative Alexandria Ocasio-Cortez dialogue at 1:52:00). oppenheimer-houseoversight-envsubcom-2019apr9.pdf