New regulations face promised court challenge from environmental groups, state attorneys general.

The outlook for new U.S. Environmental Protection Agency guidance aimed at streamlining permit approvals for natural gas pipelines and other energy infrastructure projects is murky, at best, and could lead to more frequent legal skirmishes, some observers say.

The Trump administration has begun to lay out its infrastructure rebuilding strategy, and it is increasingly clear that a cornerstone involves private-sector funding through public-private partnerships (P3s).

DOT's Foxx says regulation requires 10% greater emissons and fuel-use cuts than 2015 EPA-DOT proposal.