States are using higher registration fees for electric cars to make up for declining fuel taxes, but some are punitive, environmentalists say. A federal tax could be coming.
When not driving around, electric buses and other vehicles could help utilities by storing their solar and wind energy and releasing it to meet surges in demand.

When companies want to sell more of something, they market it. Now, at long last, electric cars are about to get the same treatment. Following an announcement at the New York International Auto Show last week, 16 major automakers are joining forces with seven states to promote sales of electric vehicles to consumers. The Alliance for Automobile...