California is set to approve even tougher air-quality controls that would further reduce greenhouse gas emissions by 2030, after the state Legislature passed Senate Bill 32 on Aug. 24.

Gov. Jerry Brown has indicated he will sign the measure, which passed the state Senate Aug. 23, after passing the state Assembly on Aug. 22. Related legislation, Assembly Bill 197, that passed on Aug. 22 would tighten state oversight of the California Air Resources Board.

The legislation requires the state to reduce greenhouse gas levels to 40% below their 1990 levels by 2030. The state has already passed legislation that requires greenhouse gas levels to return to 1990 levels, reports the Sacramento Bee.

"I look forward to signing this bill and AB 197 when they land on my desk," Brown said in a statement. "With these bills, California’s charting a clear path on climate beyond 2020 and we’ll continue to work to shore up the cap-and-trade program, reduce super pollutants and direct more investment to disadvantaged communities."