Timeline: Trump aims to end half century of California regulating car pollution

FILE PHOTO: U.S. President Donald Trump walks to address the media before boarding Marine One for a trip to New Mexico, on the South Lawn of the White House in Washington, U.S., September 16, 2019. REUTERS/Sarah Silbiger.

(Reuters) - The Trump administration said on Thursday it was revoking California’s power to set its own fuel efficiency laws, a move that could lead to legal battles over environmental policy issues that will affect the auto industry and consumers.

Here is a snapshot of California’s history of setting car pollution rules.

1966/67 - California sets the first U.S. rules for car pollution, or tailpipe emissions, after scientists reveal cars causing smog. U.S. Federal Air Quality Act allows California to set emissions standards more stringent than federal levels.

2000s - California adds greenhouse gas emissions to pollutants it regulates for vehicles. Other states follow California.

June 2009 - The Obama administration approves an Environmental Protection Agency waiver, allowing the state to set its own standards for fuel emissions, stricter than the federal limit on fuel efficiency. (

August 2018 - The Trump administration proposes a roll-back on the Obama-era fuel efficiency standards, particularly looking to strip California of its power to set its own standard.

July 2019 - California reached an agreement with Ford Motor Co F.N, BMW AG BMWG.DE, Volkswagen AG VOWG_p.DE and Honda Motor Co Ltd 7267.T on fuel efficiency, a deal that bypasses the federal government's attempt to strip California's power.

September 2019 - Trump administration confirms that the Environmental Protection Agency, a federal pollution regulator, will revoke California’s power to set its own standards for fuel efficiency.

Source: Government websites, Reuters data

Reporting by Neha Malara in Bengaluru; Editing by Maju Samuel