At a time when species across the country face mounting pressures, the Endangered Species Act remains one of the most powerful—and contested—tools we have to protect them. In this installment of our “Explained” series, host Sebastian Duque Rios is joined by three experts whose careers span law, policy, and conservation science: Patrick Parenteau (Vermont Law & Graduate School), Jake Li (Defenders of Wildlife), and David Wilcove (Princeton University).

Together, they break down how the ESA works, why it was created, and the real-world threats species face today. The conversation explores key provisions of the Act—from listing decisions and critical habitat designations to Section 7 consultations, recovery planning, and the role of private landowners. The guests also discuss how funding shortfalls, political pressures, and recent proposals could reshape endangered species protection in the years ahead.

Whether you’re new to the ESA or looking for a richer understanding of its legal, scientific, and practical dimensions, this episode offers a clear and candid look at the challenges and opportunities facing one of the nation’s cornerstone conservation laws.

As climate change reshapes our oceans, fish populations are shifting across borders and into new territories, creating ripple effects for food security, livelihoods, and international relations. These changes are intensifying pressure on governments and coastal communities—and, in some cases, fueling tension and conflict at sea. In this episode of People Places Planet, host Sebastian Duque Rios speaks with Johan Bergenas, Senior Vice President for Oceans at the World Wildlife Fund-US, and Sofia O’Connor, Director of the Environmental Law Institute’s Ocean Program, about the complex links between marine conservation, illegal, unreported, and unregulated (IUU) fishing, and international security.

Together, they explore how climate-driven migration of fish stocks can trigger disputes between nations, how data and transparency tools like WWF’s Oceans Futures platform can help policymakers anticipate and prevent those conflicts, and how legal frameworks can promote cooperation rather than conflict on the high seas.

See WWF's recent report, The Geopolitics of the Ocean, as well as their Oceans Futures platform for more information.

As the first U.S city to implement a congestion pricing program, New York City has begun charging vehicles entering high-traffic areas of Manhattan a toll. With this initiative, NYC is testing what could be a consequential urban policy for transportation and climate at the municipal level. Ten months into the program, what have we learned?

In this episode of People Places Planet, host Sebastian Duque Rios speaks about congestion pricing with Robert Puentes, Vice President and Director of Brookings Metro; Rachel Weinberger, Vice President for Research Strategy and the Peter W. Herman Chair for Transportation at the Regional Plan Association; and Christine Billy, Adjunct Professor of Clinical Law at NYU and Executive Director of the Guarini Center. Together, they unpack NYC's congestion pricing program: why it was pursued, how it works, what early data suggests about its impacts, and the waves of legal challenges that the program has faced.

In discussing how this innovative policy aims to rethink urban mobility, the conversation delves into how congestion pricing connects to broader environmental and public health goals, including the reduction of greenhouse gas emissions, and how it can present a model for other cities looking to fund and improve public transit.