A key piece California's fight against climate change is in federal court today. It's called the "Low Carbon Fuel Standard, " and it would force gas companies looking to do business in California to cut down their carbon foot print.
Last year, a judge in Fresno struck down the regulation as unconstitutional.
Today, the 9th Circuit Court of Appeals is hearing the case. Here with more is Severin Borenstein, Director of the University of California Energy Institute.