In order for California to promulgate vehicle emission standards without violating the Clean Air Act, it must receive a waiver from the EPA for any state law that regulates vehicles covered by the Act ...

California has decided to abandon its phase out of diesel trucks and requiring cleaner locomotives because of the incoming ...

President-elect Trump has threatened to revoke or challenge all zero-emission vehicle rules and California’s other clean-air ...

Environmental group blasts Trump’s plan to roll back auto emissions regulations: ‘Everyone with lungs will pay the price’ - ...

TRANS/WP.29/1045 - Special Resolution No. 1 concerning the common definitions of vehicle categories, masses and dimensions (S.R.1) ...