What is the status of evidence-based environmental policy in the U.S? Sweeping policy shifts, regulatory rollbacks, and decisions such as the withdrawal from the Paris Climate Agreement prompt questions. This Forum provided an opportunity to discuss the challenges facing environmental science today. Panelists explored areas potentially or already impacted by change, such as the Clean Power Plan, methane rules, and the Toxic Substances Control Act (TSCA) implementation — and their public health implications. Experts described how the EPA and other agencies are responding and shared ideas for steps forward to nurture and protect the principles of peer-reviewed environment science. This Forum event was presented jointly with PRI’s The World & WGBH on October 19, 2018. Watch the entire series: https://theforum.sph.harvard.edu/