Automakers are coming under increasing pressure to sell zero-emission vehicles to U.S. consumers who haven't shown much interest in them, with more states following California's lead in setting sales targets.

Nine U.S. states, including New York and New Jersey, have adopted versions of California's goal of having electric, plug-in hybrid and hydrogen-powered models reach 15 percent of new-car purchases by 2025. Automakers face fines and potentially restrictions on sales for not reaching the targets.

One model that meets the standards, Honda Motor Co.'s plug-in electric Fit, had total U.S. sales of 83 through May, according to market-researcher Autodata Corp.