SACRAMENTO -- Contra Costa County Supervisor John Gioia was sworn in Thursday as the newest member of the California Air Resources Board.

Gioia was appointed to the body by Gov. Jerry Brown in May.

Gioia said via his e-newsletter that he looks forward to "tackling critical upcoming issues, including investing the state's cap-and-trade revenues, reducing greenhouse gas emissions, advancing clean energy, and improving community health."

The 11-member Air Resources Board is part of the California Environmental Protection Agency. Among its roles is creating and enforcing air pollution control rules, and California has some of the strictest in the nation.

The ceremony took place in the Byron Sher Auditorium in Sacramento. Gioia, 55, had several members of his staff on hand.

Gioia serves on the San Francisco Bay Conservation and Development Commission and the Bay Area Air Quality Management District board. He has urged stricter regulations on Chevron's Richmond refinery after a major fire on Aug. 6 sent thousands to area hospitals.

Contact Robert Rogers at 510-262-2726 or rrogers@bayareanewsgroup.com and follow Twitter.com/roberthrogers.