Environmental Deregulation: 100+ Rules Rolled Back Across Four Years
The administration's approach was systematic: identify Obama-era environmental regulations, determine legal and administrative mechanisms for reversal, and implement reversals. The rollbacks covered air quality, water quality, climate, wildlife, and chemical safety. The vehicle emissions standards rollback was estimated to add approximately one billion tons of additional carbon dioxide to the atmosphere by 2035. Courts overturned many of the rollbacks, finding procedural defects. The Biden administration reversed the majority of the remaining reversals. The cumulative effect on environmental law precedent and the transition costs of the repeated changes were lasting.
Record summary
Grade
Grade 4 of 5: Critical Rights and Rule-of-Law Concern
Systematic actions that undermine fundamental constitutional or international legal protections at the structural level. Scale and definitions
- Status
- Concluded
- Incident date
- Record updated
- Location
- Washington, D.C.
- Category
- Rule of Law
- Legal posture
- Reported
- War-crime classification
- Enabling conduct
- Verification
- Independently verified
- ICC relevance
- No
- Sources
- 4 cited
- Stable ID
trump-deregulation-environment-rollbacks- Victims
- Communities located near power plants and industrial facilities with relaxed emissions standards; future generations bearing the impacts of increased greenhouse gas emissions; wildlife species affected by weakened Endangered Species Act protections; wetlands and waterways under reduced Clean Water Act jurisdiction
- Alleged responsible parties
- Donald Trump, President; directed systematic environmental deregulation; appointed industry-aligned officials to lead EPA and Interior Department— White House
- Scott Pruitt, EPA Administrator 2017–2018; resigned amid corruption scandals; oversaw major regulatory rollbacks before resignation— U.S. Environmental Protection Agency
- Andrew Wheeler, EPA Administrator 2018–2021; former coal industry lobbyist; continued and expanded regulatory rollback after Pruitt resignation— U.S. Environmental Protection Agency
Key points
- The Columbia Law School Sabin Center tracked 125 deregulatory actions by the Trump administration affecting environmental protection — the most systematic rollback since the EPA was created in 1970
- The most significant climate rollback was the Safer Affordable Fuel-Efficient (SAFE) Vehicles Rule, which weakened Obama-era vehicle fuel efficiency standards; analysts estimated this would add approximately one billion additional tons of CO2 to the atmosphere by 2035
- The administration weakened the Clean Water Act's jurisdiction over 'Waters of the United States' — removing federal protection from millions of acres of wetlands and hundreds of thousands of miles of streams that had been covered under the Obama-era definition
- Mercury and Air Toxics Standards for power plants were weakened through a cost-benefit reanalysis that excluded health co-benefits; the rule had been estimated to prevent 11,000 premature deaths annually; courts later vacated this rule as arbitrary
- The administration finalized a rule in 2020 revising the Endangered Species Act to allow economic factors to be considered in listing decisions and to weaken 'critical habitat' designations — changes that conservation biologists said would accelerate extinction rates for already-listed species
- Many of the rollbacks were challenged in court and reversed as arbitrary and capricious — courts found repeatedly that agencies had failed to provide adequate justification for reversals; by some counts more than 40% of the rollbacks were struck down by courts
Overview
The Trump administration rolled back more than 100 environmental rules — the most systematic deregulation since the EPA was created in 1970. The reversals covered air quality, water quality, climate emissions, wildlife, and chemical safety.
Many were later struck down by courts as arbitrary and capricious. The ones that stood represent lasting changes to the legal framework protecting the environment.
The Vehicle Emissions Standards
The most significant climate rollback in terms of measurable emissions impact was the vehicle fuel efficiency standard reversal. Obama's standard required increasing efficiency through 2025; Trump froze it at 2020 levels. Analysts estimated this would add approximately one billion additional tons of CO2 to the atmosphere by 2035 — a significant contribution to the accumulation driving climate change.
The reversal was challenged in court; the Biden administration reinstated the standards.
Clean Water Jurisdiction
The "Waters of the United States" definition determines which waterbodies have federal Clean Water Act protection. The Obama-era rule had extended protection to smaller wetlands and streams that flow into larger waterways. Trump's rollback removed that protection — eliminating federal oversight of millions of acres of wetlands and hundreds of thousands of miles of streams.
Wetlands filter pollutants from groundwater and provide flood protection. Their legal status is directly tied to their practical protection.
The Mercury Rule
The mercury and air toxics standard for power plants was weakened through a reanalysis that excluded the air quality co-benefits of reducing emissions. The original rule was estimated to prevent 11,000 premature deaths per year. Courts later struck down the revised cost-benefit methodology as arbitrary.
The people affected by the air quality in communities near power plants were not consulted about the reanalysis.
International law engaged
| Instrument | Provision | What it protects or prohibits |
|---|---|---|
| United Nations Framework Convention on Climate Change | Article 4 | National policies to mitigate climate change — systematic rollback of vehicle and power plant emissions standards directly increased U.S. greenhouse gas emissions |
Update log
-
Updated with full count of rolled-back rules.
Sequence of events
-
Executive orders on energy — federal lands opened
Trump signs executive orders directing federal agencies to facilitate energy production on public lands and waters, opening the regulatory process for fossil fuel production increases.
-
Obama clean power plan ordered reviewed — rollback begins
Trump signs executive order directing EPA to review and rescind the Obama Clean Power Plan — the primary federal climate regulation covering power plant emissions.
-
Vehicle emissions standards weakened — 1 billion additional tons CO2
Administration proposes freezing Obama-era fuel efficiency standards at 2020 levels rather than continuing to increase them through 2025; analysts estimate approximately 1 billion additional tons of CO2 by 2035.
-
WOTUS rule rolled back — millions of wetland acres lose protection
EPA finalizes the Navigable Waters Protection Rule, removing federal clean water protections from millions of acres of wetlands and hundreds of thousands of miles of streams.
-
Endangered Species Act protections weakened
Administration finalizes rule revisions to the Endangered Species Act allowing economic factors in listing decisions and weakening critical habitat designations.
Sources
- The Trump Administration Is Reversing 100 Environmental Rules. Here's the Full List. — The New York Times
- Trump has gutted more than 125 environmental rules. Here's what's gone. — The Washington Post
- AP analysis: Trump administration reversed environmental rules — The Associated Press
- Tracking Deregulation in the Trump Era — Columbia Law School Sabin Center for Climate Change Law