California leads the nation in electric vehicle sales, and now is joining forces with Oregon and several Northeastern states to put 3.3 million zero-emission vehicles on the road by 2025.

Gov. Jerry Brown and his counterparts in Connecticut, Maryland, Massachusetts, New York, Oregon, Rhode Island and Vermont signed a set of agreements Thursday that includes adding zero-emission vehicles to public fleets and harmonizing building codes to make it easier to install electric-vehicle charging stations.

"This is not just an agreement but a serious and profoundly important commitment," Brown, long a champion of electric vehicles, said in a statement. "From coast to coast, we're charging ahead to get millions of the world's cleanest vehicles on our roads."