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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.

Never before in our lifetimes has the rule of law felt so tenuous. These are not normal times for a research and advocacy organization dedicated to “harnessing the power of law and public policy to create a responsive government, healthy environment and just society.” Many of the policy ideas that we have championed — for example, worker safety protections, a fair regulatory system, climate actions that address equity concerns — have been adopted in some form. And today, these policies, as well as the democratic institutions which enforce them, are under threat.

In April, the Trump administration published an executive order (EO) boosting the coal industry in hopes of a grand revival for an energy source that has been in stark decline since more cost-effective sources, including gas and renewables, drove it from its peak nearly two decades ago. Included in this order was a two-year exemption to a rule that would have required some of the country’s most polluting power plants to reduce emissions of mercury and other hazardous air pollutants that harm our health.

Since our last update (March 18), we have seen some small changes regarding CRA resolutions. There have been no new resolutions signed into law (only two so far), and there are now seven resolutions that have passed one chamber. This means that in addition to the six resolutions that had already cleared one chamber (you can see our previous update for a detailed description of those resolutions), there have been votes on four other resolutions.

The second Trump administration’s disastrous early-term actions do nothing to address the economic inequality that our political classes have long ignored. In its first two weeks, the administration has withdrawn from the Paris Climate Accords, reversed federal initiatives on environmental justice, withheld public health information, frozen spending on environmental and climate mitigation programs, threatened to withhold federal disaster aid, and just recently threatened to fire more than 1,000 U.S. Environmental Protection Agency (EPA) workers who focus on climate and environmental enforcement.

A sleeper provision in one of President Donald Trump’s executive orders attempts to revolutionize the way the National Environmental Policy Act (NEPA) operates and cut environmental review to a minimum.