California's efforts to implement stricter emissions rules for diesel-powered trains and big rigs have hit a roadblock as the state withdrew its requests for federal approval. The California Air Resources Board made this decision due to the lack of approval from the U.S. Environmental Protection Agency (EPA). The move comes just before the end of President Joe Biden's term, with concerns about potential opposition from the incoming administration.
One of the rules that California pulled back on aimed to phase out the sale of new diesel-powered semi-trucks and buses by 2036. Another regulation would have banned locomotive engines over 23 years old by 2030, promoting the use of zero-emissions technology in freight transportation. Both rules faced industry opposition, citing high costs and implementation challenges.
The Air Resources Board expressed disappointment over the EPA's inaction but emphasized the importance of withdrawing the requests given the uncertain political climate. The agency is now evaluating its options to continue efforts to reduce emissions and enhance air quality, although specific plans have not been disclosed.
California has historically had the authority to set stricter emissions standards than federal regulations. Despite challenges during the Trump administration, a federal court upheld California's ability to establish leading vehicle emissions standards. Recently, the EPA granted California the authority to enforce a rule prohibiting the sale of new gas-powered cars in the state by 2035.
While the EPA has indicated it will not take further action on the withdrawn rules, the transition team for the incoming president has pledged to prioritize improving air and water quality during the upcoming term. The future direction of California's emissions regulations remains uncertain as the state navigates evolving federal policies and its commitment to environmental protection.
