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.

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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.