The California Air Resources Board on Friday night approved new clean air standards that are expected to raise gas prices— a proposal that faced fierce criticism from lawmakers for the board's lack of transparency on its cost to consumers and also from environmental groups who said it doesn't do enough to reduce air pollution.

Experts don’t know how much gas prices may rise from the revised California climate program, which tightens standards and gives incentives for low-carbon fuels. The board ordered an annual review of the cost impacts.

The California Air Resources Board on Friday approved stricter carbon-intensity standards on fuels to help meet the state’s climate targets, even though questions have been raised that doing so may lead to a spike in gasoline prices.

California air quality regulators late Friday approved tougher rules to encourage use of lower-carbon fuels, overriding objections that the action would lead to higher gasoline prices for motorists. On an 12-to-2 vote,

The California Air Resources Board strengthened climate and pollution standards for gasoline and other transportation fuels. That’ll have public health benefits, but will raise gas prices

New regulations aimed toward limiting the carbon intensity in fuels in California could curb the state’s ongoing drop in gas prices. According to the Los Angeles Times, the California Air Resources Board approved the new measures in a 12-2 vote.