The Dec. 4 seminar is free and bilingual; it is set for 8 a.m. to 2 p.m. at the Energy Innovation Center, 4760 Clairemont Mesa Blvd. Owners of small- and medium-sized businesses can learn how to reduce their energy costs and more at a free, bilingual seminar hosted by San Diego Gas & Electric on Dec. 4. Owners and administrators will learn simple measures they can take to improve their businesses' energy efficiency, find out how to save on lighting, heating and air conditioning costs, and better understand rates available for commercial customers. They also will be able to create a customized plan to reach their energy-saving goals.