Chesapeake Bay Foundation Joins Lawsuit Over Federal Greenhouse Gas Rollback

Environmental group fights to protect the Chesapeake Bay from climate change threats.

Apr. 8, 2026 at 9:24pm

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A bold, highly structured abstract painting in muted tones of green, blue, and gray, featuring sweeping geometric arcs, concentric circles, and precise botanical spirals, conceptually illustrating the intricate natural systems of the Chesapeake Bay region under threat from climate change.An abstract visual representation of the complex climate forces impacting the Chesapeake Bay, as environmental groups fight to maintain critical environmental protections.Today in Pittsburgh

The Chesapeake Bay Foundation, represented by Earthjustice, has joined a coalition of organizations filing a lawsuit over the federal repeal of the greenhouse gas endangerment finding. This finding has supported regulations to fight climate change and its harmful impacts on the Chesapeake Bay region, including sea level rise, extreme heat, stronger storms, and warmer waters.

Why it matters

The Chesapeake Bay is on the front lines of climate change threats, with rising seas, intensifying storms, and warming waters damaging communities, ecosystems, and wildlife across Maryland, Virginia, Pennsylvania, and Washington, D.C. The repeal of the greenhouse gas endangerment finding threatens to undermine efforts to address these growing climate impacts.

The details

The greenhouse gas endangerment finding, issued in 2009, has provided the legal basis for regulations to reduce greenhouse gas emissions and mitigate climate change. The Chesapeake Bay Foundation has worked to address climate threats through initiatives like planting urban trees, installing living shorelines, and partnering with farmers to build resilient soil. The foundation is now joining the lawsuit to fight the federal rollback of this critical environmental protection.

  • The greenhouse gas endangerment finding was issued in 2009.
  • The federal government repealed the endangerment finding in 2026.
  • The Chesapeake Bay Foundation joined the lawsuit on April 8, 2026.

The players

Chesapeake Bay Foundation

A nonprofit organization dedicated to protecting and restoring the Chesapeake Bay and its watershed, which covers parts of Maryland, Virginia, Pennsylvania, and Washington, D.C.

Earthjustice

A nonprofit public interest law organization that provides legal representation and advocacy in environmental cases.

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What they’re saying

“Climate change is already harming people and the Chesapeake Bay, regardless of the Trump Administration's ridiculous claims. This latest rollback is a threat to us all.”

— Alison Hooper Prost, Senior Vice President for Programs, Chesapeake Bay Foundation

What’s next

The judge will decide on the lawsuit challenging the federal repeal of the greenhouse gas endangerment finding.

The takeaway

The Chesapeake Bay Foundation's participation in this lawsuit highlights the critical importance of maintaining environmental protections to address the growing threats of climate change, which are already damaging the Chesapeake Bay region and its communities.