California has withdrawn its requests to enforce groundbreaking zero-emission rules for trucks and locomotives, citing expected challenges from the incoming Trump administration. This move reflects the ongoing clash between federal and state environmental policies.

California Withdraws Pollution Rule Requests
California announced the withdrawal of requests to enforce zero-emission mandates for trucks and trains ahead of President-elect Donald Trump’s inauguration. State officials anticipate opposition from the new administration, which has previously criticized California’s stringent pollution regulations.
Advanced Clean Fleets and In-Use Locomotive Regulation
The withdrawn requests included California’s Advanced Clean Fleets program, which required operators to purchase zero-emission trucks, and the In-Use Locomotive Regulation, aimed at reducing diesel emissions. These rules had been pending EPA approval for over a year.
Federal Waiver System and Legal Challenges
California’s stricter-than-federal rules depend on waivers under the Clean Air Act. The Trump administration’s expected resistance influenced the decision to withdraw. Industry groups had previously filed lawsuits against these mandates, adding to the regulatory uncertainty.
Health and Environmental Impacts at Stake
The rules were projected to bring significant health benefits, including reducing heart attacks and asthma complications. A report by the American Lung Association estimated savings of over $58 billion, emphasizing the potential public health value of the regulations.
California’s Broader Clean Air Goals
Despite the withdrawal, other California regulations aimed at reducing diesel truck emissions and phasing out fossil-fuel passenger cars by the 2030s remain intact. These measures received EPA approval in December, highlighting the state’s commitment to combating climate change.
Mixed Reactions from Stakeholders
While environmental groups expressed disappointment, industry representatives welcomed the withdrawal. The Association of American Railroads lauded the decision, citing concerns about the feasibility of the locomotive emissions rule.
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