Last mentioned: Mar 21, 2026
Multi-State Lawsuit Filed
24 states and 10 cities sue to block the repeal in federal court.
EPA Repeals Finding
The agency formally rescinds the 2009 determination.
Current Rollback
The EPA announces a new rule to weaken limits, citing industry economic relief.
Standards Strengthened
The Biden administration restores and tightes mercury limits to record levels.
Cost-Benefit Revision
The EPA under the Trump administration weakens the legal justification for the rule.
MATS Established
The Obama administration issues the first national standards for mercury emissions from power plants.
Endangerment Finding Issued
EPA officially finds that six greenhouse gases threaten public health.
Massachusetts v. EPA
Supreme Court rules EPA has authority to regulate GHGs if they endanger health.
The Administrator of the Environmental Protection Agency is scheduled to headline an event hosted by an organization that denies the existence of a climate crisis. This move signals a significant shift in federal environmental policy and a potential departure from long-standing scientific consensus within the agency.
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 argues that removing the scientific basis for greenhouse gas regulation is arbitrary and threatens public health.
The Environmental Protection Agency has officially weakened mercury and air toxics standards for coal-fired power plants, reversing years of stringent environmental oversight. This regulatory pivot aims to reduce operational costs for the aging coal fleet but faces immediate backlash from public health advocates and environmental groups.
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. |