California Energy Policy Has Reduced Carbon Emissions. By Exactly How Much, Nobody Knows

The California Legislative Analyst’s Office released a report Monday on how well the state’s energy policies are working in terms of reducing greenhouse gas emissions.

The analysis found that the state requirement that utilities continually increase the amount of renewable energy they provide has been a “significant” driver in curbing emissions.

The LAO, however, was not able to determine exact figures for how much the cut in emissions is attributable to state law versus other factors, and the agency cited as problematic a lack of specific research that evaluates California climate policy.