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Teaching environmental law has always been hard. The problem is, it’s about things our students care about. It’s about what Exxon knew, and the BP oil spill, and birds soaked with oil, and little kids with asthma or lead poisoning or cancer because wealthy people in corporate boardrooms were indifferent to the suffering of Black and Brown communities. It’s about Native Americans marching in protest to protect sacred lands their ancestors have stewarded and protected for millennia. I suppose this varies by region, but here in north Philadelphia, students come into class energized, outraged, and ready to defend the powerless and speak truth to power.

My book with fellow Member Scholar Rebecca Bratspies was inspired by an article written by former UN Special Rapporteur (and Member Scholar) John Knox (and co-author Nicole Tronolone) evaluating U.S. environmental law through the framework of international human rights law. With several noteworthy exceptions (such as climate change), Knox and Tronolone concluded that the U.S. (at the end of the Biden administration) generally complied with the substantive and procedural requirements of the right to a healthy environment. However, they described the government’s failure to address environmental injustice as nothing short of “catastrophic.” Far from remedying these shortcomings, the current administration is reinforcing them, as regulatory rollbacks proliferate, equity-based initiatives are dismantled, and coordinated political campaigns seek to ban the teaching of "divisive concepts" such as climate change and racial justice.

Teaching right now is no joke! This is especially true of teaching environmental law. Most of us teaching in this area have dedicated our professional lives to protecting the environment — the air, the water, the land, and of course the people who breathe that air, drink that water, and live on that land. Each day is more painful than the last as our work is dismantled in front of our eyes. Institutions that seemed solid bulwarks against tyranny are crumbling into dust. In this moment of crisis, fellow Member Scholar Carmen Gonzalez and I set out to write a book for our fellow professors struggling to find their feet — consider Teaching Environmental Law in Context a kind of love letter to the better world we are convinced we can build together with our students.

The Trump administration recently repealed the U.S. Environmental Protection Agency’s 2009 endangerment finding—the scientific and legal determination that greenhouse gases threaten public health and welfare that has anchored federal climate regulation for nearly two decades. Environmental Protection Agency Administrator Lee Zeldin called the finding “the Holy Grail of federal regulatory overreach.” Within weeks, a coalition of more than 20 states filed suit in the U.S. Court of Appeals for the D.C. Circuit to reverse the repeal. The legal battle that follows will help define American environmental policy for a generation. Brigham Daniels and I did not plan the timing of our new book, Lessons for a Warming Planet: A Vital History of US Environmental Law, to coincide with this particular legal conflict. But we could not have chosen a more clarifying moment for its release. The endangerment finding repeal is not an aberration—it is a recognizable recurrence in a history that stretches back centuries. Law has always been the primary engine of both environmental exploitation and protection in the United States.

As the release date of my forthcoming book, Unlearn Power: Strengthening Communities in the Age of Environmental Crisis, approaches, naturally, I've been asked, "What's the book about?" But given the amalgamation of ecological devastation across the planet, with fallout and stakes unevenly felt across socioeconomic lines and underscored by political forces that engage in climate denialism and assaults on democratic institutions, I urge that "Why Unlearn Power?" is the more apropos question.

The 56th Earth Day may also be the bleakest. Wave upon wave is crashing upon our system of ecological protections. But having spent years studying the full sweep of American environmental legal history, we can say with confidence: the bigger the wave, the stronger the undercurrent.

This Earth Day, environmental advocates are looking backward as well as forward. With the U.S. federal government so dramatically overhauling environmental policy, history shows how American social movements of the 19th and 20th centuries overcame seemingly insurmountable odds to preserve public lands and pass laws protecting human health. “I’ve been trying to look through the history of the United States to understand how we’ve gotten where we are,” said Alejandro Camacho, a Professor of Law at UCLA School of Law and co-author of Lessons for a Warming Planet: A Vital History of U.S. Environmental Law, which comes out on Earth Day, April 22, 2026. “Prior generations did meet the moment and at least partially addressed some of the major problems that were in front of them.” Camacho discusses the book in this lightly edited transcript.

The current Trump administration has made individualized exceptions and waivers one of the signature features of its governing approach.

There are many reasons why Senate Republicans’ recent decision to defy the parliamentarian and repeal California’s Clean Air Act waivers using the Congressional Review Act (CRA) was objectionable. But one objection that hasn’t received enough – any? – attention is how legislative gimmicks like the CRA contribute to the broader problem of congressional dysfunction.