US EPA to Repeal Carbon Pollution Standards for Power Plants: What It Means for Climate and Energy Markets

The US Environmental Protection Agency is expected to formally repeal carbon pollution standards for coal- and gas-fired power plants, reversing a Biden-era rule finalized in 2024. The rollback, which could be announced by EPA Administrator Lee Zeldin at the G20 energy ministers meeting in Houston, removes federal limits on greenhouse gas emissions from the power sector, which accounts for nearly a quarter of US emissions. The move is likely to face legal challenges from environmental groups like the Sierra Club. The projected impact of the original rule was a reduction of 1 billion metric tons of emissions by 2047. Without it, power generators face less federal pressure to retire coal plants or adopt carbon capture, potentially slowing grid decarbonization. However, state-level carbon pricing and clean energy mandates remain in place, so the effect on renewables investment and carbon markets may be uneven. Investors and market watchers will need to track litigation outcomes and state policy responses.