U.S.: government aims to repeal vehicle GHG emission rules

The U.S. Environmental Protection Agency (EPA) plans to repeal all greenhouse gas (GHG) emission standards for light-duty (LDVs), medium-duty (MDVs), and heavy-duty (HDVs) vehicles and engines in the coming days after it removes the scientific finding that justified those rules, according to a summary of the proposal.

The EPA claims that the Clean Air Act (CAA) does not grant the agency authority to establish emission standards specifically aimed at addressing global climate change. The agency also plans to rescind the finding that GHG emissions from motor vehicles and engines pose a threat to public health by challenging the scientific basis on which the original determination was made.

The U.S. Supreme Court’s 2007