Biden administration faces tight deadline to approve California's locomotive and truck rules

With less than two weeks before Trump’s inauguration, California is pressing the Biden administration to approve its remaining emissions rules for trucks and trains, which could bring billions in health benefits but faces industry resistance.

Blanca Begert and Alex Nieves report for POLITICO.


In short:

  • California’s locomotive rule mandates all new trains be zero-emission by 2035, while the Advanced Clean Fleets (ACF) rule requires fleets to shift toward zero-emission trucks.
  • Industry groups, including the Association of American Railroads and the California Trucking Association, have challenged the rules in court, arguing regulatory overreach.
  • Environmental advocates warn that failure to secure federal approval before Trump takes office could jeopardize key climate initiatives aimed at reducing smog-forming pollutants.

Key quote:

“It’s a huge deal. This is a fundamental reshaping of the way that at least California’s supply chain would work.”

— Chris Shimoda, California Trucking Association senior vice president

Why this matters:

The rules aim to significantly cut air pollution linked to heart disease, asthma and other health issues. Without federal approval, California’s ability to enforce these standards and meet ozone reduction goals could be compromised.

Related coverage: California secures emissions waiver as Trump plans reversal

A row of solar panels in a desert environment

The 'age of electricity' is here. No one knows what comes next

As the war in Iran upends global fuel markets, two new reports confirm that 2025 was a banner year for renewable energy.

Speech by the President of Ukraine Petro Poroshenko at the 21st session of the UN Conference on Climate Change
Credit: palinchak/BigStock Photo ID: 110010617

As the UN global climate talks lose momentum, a smaller coalition eyes a fossil fuel exit

More than 50 countries will gather in Colombia to try to develop real-world timetables to phase out oil and gas amid global energy shocks and petrostate stalling.
pumpjacks silhouetted against a setting (or rising) sun

Republican lawmakers attempt to shield big oil from climate lawsuits in ‘alarming’ bills

Climate experts and advocates warn House and Senate bills will protect polluters at the cost of the climate.

An aging oil pump jack in a desolate location

‘Cut fossil fuel industry’s lifeline’: How subsidies and petrochemicals are propping up oil and gas

At Colombia energy summit, experts urge ending fossil subsidies, curbing petrochemicals, limiting industry sway, and boosting clean energy.

A Black man talking to his child in a hospital bed

How Canadians pay for fossil fuels with our bodies

The affordability crisis brings about talk of the price at the gas pump, but more Canadians are realizing the cost climate change is taking on our health.

Orange Hitachi excavator working a coal mine.
Credit: Team Kieselteam_kiesel/Unsplash

Move to relax federal coal ash rules 'potentially concerning'

The proposed loosening of federal coal ash disposal regulations is not expected to affect North Carolina’s robust management rules -- at least for the time being.
A wall of servers in a data center
Credit: philip1652/BigStock Photo ID: 7646803

How Google turned its climate program into an AI booster

A "carbon-intelligent computing" tool has come in handy as the tech giant negotiates with utilities to connect data centers to the grid.
From our Newsroom
Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

One facility has emitted cancer-causing chemicals into waterways at levels up to 520% higher than legal limits.

Regulators are underestimating health impacts from air pollution: Study

Regulators are underestimating health impacts from air pollution: Study

"The reality is, we are not exposed to one chemical at a time.”

Pennsylvania governor Josh Shapiro speaks with the state flag and American flag behind him.

Two years into his term, has Gov. Shapiro kept his promises to regulate Pennsylvania’s fracking industry?

A new report assesses the administration’s progress and makes new recommendations

silhouette of people holding hands by a lake at sunset

An open letter from EPA staff to the American public

“We cannot stand by and allow this to happen. We need to hold this administration accountable.”

wildfire retardants being sprayed by plane

New evidence links heavy metal pollution with wildfire retardants

“The chemical black box” that blankets wildfire-impacted areas is increasingly under scrutiny.

Stay informed: sign up for The Daily Climate newsletter
Top news on climate impacts, solutions, politics, drivers. Delivered to your inbox week days.