LOS ANGELES — California, long a national leader in cutting auto pollution, pushed the envelope further Friday as state regulators approved rules to cut greenhouse gas emissions from cars and put significantly more pollution-free vehicles on the road in coming years.

The package of Air Resources Board regulations would require auto manufacturers to offer more zero- or very low-emission cars such as battery electric, hydrogen fuel cell and plug-in hybrid vehicles in California starting with model year 2018.

By 2025, one in seven new autos sold in California, or roughly 1.4 million, must be ultra-clean, moving what is now a driving novelty into the mainstream.

The rules also toughen all new-car standards for emissions that form smog and contribute to global warming.

Auto manufacturers are uneasy with some of the provisions but generally support the package, which took three years to develop.

The requirements are expected to drive up car prices. The board staff predicts that the advanced technologies needed to meet the new standards will add $1,900 to the price of a new car in 2025. But that would be more than offset by $6,000 in estimated fuel savings over the life of the vehicle, according to the board's staff.

Zero-emission autos now make up a minuscule portion of the more than 26 million cars in California, with just a few hundred fuel cell cars and about 34,000 battery electric autos on the road.