Controversial climate rule, which could raise gas prices, takes effect Tuesday in California

CALIFORNIA’S REVAMPED Low Carbon Fuel Standard takes effect on Tuesday, despite fierce Republican criticism and increasing Democratic trepidation over its potential to raise gas prices.

The new rules — which expand a program to reduce climate-warming gases and clean the air — ratchet up requirements for cleaner fuels and broaden a $2 billion credit market aimed at cutting emissions from cars, trucks and freight.