Eight U.S. states accounting for more than one quarter of the nation’s car market are expected on Thursday to unveil details about a 2013 agreement to promote sales of electric vehicles, which have zero emission, by 2025, according to a report.

The states, including California, Connecticut, Maryland, Massachusetts, New York, Oregon, Rhode Island and Vermont, will try to boost sales via a combination of subsidies and new regulations, the Wall Street Journal reported on Thursday.

The report said the demand for such vehicles is slipping, citing a Morgan Stanley (NYSE:MS) research note to its clients that suggested a 1 percent global market share for such vehicles by 2020 is a more realistic expectation than previous estimates of a 5 percent to 10 percent share.

The new details to be released include plans to build workplace recharging facilities, boosting financial incentives for buyers and steps to encourage more dealers to sell them.