No immediate hike in California gas prices will occur but Democrats and Republicans in the Legislature fear the effects of the clean-fuel program.

The U.S. Senate decision could upend California’s phaseout of gas-powered cars and its decades-long battle against air pollution. Some experts say Congress’ move is illegal and is likely to trigger a legal battle.

California’s new Low Carbon Fuel Standard offers incentives for cleaner fuels and would raise gasoline and diesel fuel prices.

Truck manufacturers won’t file legal challenges over California’s controversial mandate, and in return, the state air board will relax some smog-fighting requirements.

Nations addressing climate change took on gasoline and diesel vehicles in pledges that mirror California’s mandates and plans — and in some cases, go even further.