Last mentioned: Mar 20, 2026
The Trump administration EPA officially revokes the 2009 scientific finding.
Public health and environmental groups file the first lawsuit against the repeal.
24 states and 10 cities file a major challenge in the D.C. Circuit Court of Appeals.
Multi-State Lawsuit Filed
A coalition of 23 states and 14 cities sues the EPA in the D.C. Circuit Court of Appeals.
Current Rollback
The Trump administration finalizes the easing of toxic emission limits for coal-fired utilities.
Trump Revokes Finding
The Trump administration formally terminates the 2009 conclusion to halt climate regulations.
Biden Strengthening
The EPA finalizes a rule to tighten mercury limits, specifically targeting lignite coal plants.
First Trump Rollback
The EPA first attempts to weaken the 'appropriate and necessary' finding for MATS.
MATS Introduced
The Obama administration issues the first national standards for mercury and toxic air pollutants from power plants.
Endangerment Finding Issued
The EPA determines greenhouse gases threaten public health, triggering Clean Air Act mandates.
Endangerment Finding Issued
The EPA under President Obama officially declares greenhouse gases a threat to public health.
A coalition of 24 states and 10 cities has filed a lawsuit against the EPA to block the repeal of the 2009 endangerment finding. The legal challenge seeks to restore the scientific foundation that allows the federal government to regulate greenhouse gas emissions under the Clean Air Act.
A coalition of 23 states and 14 cities has filed a lawsuit against the EPA to overturn the Trump administration's repeal of the 2009 endangerment finding. The legal challenge seeks to restore the scientific foundation that mandates federal regulation of greenhouse gas emissions under the Clean Air Act.
The Trump administration has finalized a significant rollback of federal limits on mercury and other toxic air pollutants from coal-fired power plants. The move reverses stringent Biden-era environmental protections to reduce compliance costs for the fossil fuel industry, sparking a sharp divide between utility operators and public health advocates.
This page surfaces every story mentioning Environmental Protection Agency across our climate coverage. We track each entity's appearance over time so readers can trace how the narrative evolves — which developments are isolated incidents, which build into longer arcs, and which reframe how operators in the space think about the entity. Story selection uses the same multi-source verification gate applied across the rest of our coverage.
Read our editorial methodology for how we identify, deduplicate, and score entity references. Our glossary defines the technical terms used across stories on this page, and our trends index contextualizes individual developments against the longer-running climate beat. Cross-entity comparisons live on our compare view.
| What you see | What it tells you |
|---|---|
| Story count | Number of distinct stories where Environmental Protection Agency was a primary or referenced actor. |
| Recency clustering | Whether mentions are concentrated in a recent window (a news cycle) or distributed (a sustained arc). |
| Sentiment distribution | Aggregate sentiment of the stories mentioning this entity, weighted by impact score. |
| Cross-niche links | When the same entity surfaces in our sibling networks, we link to those views to enrich context. |