As U.S. automakers pull back on plans to invest heavily in electric vehicles, claiming sales are not growing as fast as expected, the Treasury Department and Internal Revenue Service issued new guidelines on the federal tax credits for EVs that could further slow sales.

The Southern California region's supply could produce enough lithium to release the U.S. from its dependence on foreign sources of the key mineral, according to a new report.

The Department of Energy said it would provide $275 million for seven projects around the country that are meant to bolster domestic clean energy supply chains.

New Mexico regulators adopted zero-emission requirements for cars and trucks in a move that proponents say will improve air quality, fight climate change and increase consumers’ choice of vehicles.