The Trump administration has taken its most far-reaching step yet in dismantling federal climate policy, revoking the Environmental Protection Agency’s (EPA) 2009 endangerment finding—the scientific and legal foundation for regulating greenhouse gas emissions in the United States (US).
The repeal simultaneously abolishes all federal tailpipe emissions standards for cars and lorries.
President Trump hailed the move as the “single largest deregulatory action in American history”, claiming it would save Americans significant costs. The EPA estimates the rollback will save taxpayers around R20.8 trillion (US$1.3 trillion), though critics dispute this figure.
The endangerment finding—introduced under the Obama administration—classified carbon dioxide, methane and four other greenhouse gases as threats to public health. It enabled federal regulation of emissions from vehicles, power plants and heavy industry. Its removal now unravels nearly two decades of climate regulatory architecture.
Environmental groups warn the consequences will be severe, arguing that scientific evidence supporting the dangers of greenhouse gases is stronger than ever. They note that the Biden-era emissions rules, now effectively void, were projected to generate annual net benefits of R1.58 trillion (US$99 billion), including R736 billion (US$46 billion) in reduced fuel costs and R256 billion (US$16 billion) in lower maintenance costs. Consumers were expected to save about R96,000 (US$6,000) over a vehicle’s lifetime—savings now lost.
Public-health experts caution that increased fossil-fuel emissions will worsen air quality and exacerbate respiratory and cardiovascular illness. Economists, meanwhile, warn that climate-intensified disasters—extreme heat, flooding and wildfires—will impose costs far exceeding any claimed short-term economic benefits.
Several states fear their own environmental standards may be undermined, with legal uncertainty threatening existing clean-air and clean-energy frameworks. State attorneys general have labelled the decision “legally flawed” and vowed to mount court challenges.
With environmental groups preparing for years of litigation, the repeal marks a decisive and controversial turn in US climate policy—one expected to shape both national and global emissions trajectories for years to come.
Staff Writer
Reporting from the front lines of the automotive industry, delivering expert analysis and the technical updates that drive the South African motor sector forward.