In this week's podcast we share an in-depth interview with Gina McCarthy, former administrator of the Environmental Protection Agency (EPA) and currently a Menschel Senior Leadership Fellow at Harvard T.H. Chan School of Public Health. During her nearly four years at the helm of the EPA McCarthy helped spearhead the Obama Administration’s efforts to address climate change and increase use of renewable sources of energy. McCarthy has become a vocal advocate for the need to address climate change—and has called on scientists to be more outspoken on the issue. We spoke with McCarthy about the EPA’s critical role in protecting the public’s health, the challenges the agency faces in protecting our water and air—especially in the wake of Flint’s water crisis, and why we should view climate change as an opportunity for innovation.