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California is being sued over its new emission laws mandating that companies there and out of state report their supply chain emissions and mitigation efforts.

Senior Republicans are seeking to undo emissions targets the Federal Highway Administration is requiring of state transportation agencies.

Bay Area startup touts electric vehicle's ability to boost fuel economy while reducing emissions. Story by Keiron Greenhalgh.

Powering America’s Commercial Transportation (PACT) — launched by Daimler Truck North America, Navistar Inc., and Volvo Group North America — is setting out to educate policymakers, regulators and other stakeholders in Washington and around the nation on the zero-emission infrastructure needs of the trucking industry. 

DETROIT — More than 4,700 auto dealerships across the U.S. urged President Joe Biden in a letter Jan. 25 to halt the EPA's efforts to enforce stricter vehicle-pollution standards.

Volkswagen AG lost another lawsuit in a German court over its software fix for engines in the wake of the diesel scandal that tarnished the reputation of Europe’s biggest carmaker.

Cummins agreed to pay a $2 billion penalty as part of a Department of Justice investigation that determined devices that bypassed emissions sensors had been installed on Cummins engines.

A judge has denied a challenge to the South Coast Air Quality Management District's landmark rule intended to clear Southern California skies of exhaust tied to the logistics industry.

Two interstate companies operating heavy-duty truck fleets in California agreed to legal settlements with the U.S. Environmental Protection Agency.

House Republicans approved a bill Dec. 6 to block strict new tailpipe pollution limits proposed by the Biden administration, calling the plan a back-door mandate for electric vehicles.