LOS ANGELES—Candidates vying for a seat on Los Angeles County’s Board of Supervisors debated key environmental policy issues as the primary elections for county supervisors draw closer. On March 24, candidates for LA County Supervisor District 3—which spans from the Westlake Village to the San Fernando Valley to West Hollywood—participated in a debate hosted by the Los Angeles League of Conservation Voters, an environmental group based in West Hollywood. The three candidates currently running for the seat are West Hollywood City Councilwoman and former Mayor Lindsey Horvath, former state Assembly Speaker and Sen. Bob Hertzberg (D-Van Nuys), and state Sen. Henry Stern (D-Los Angeles), formerly an environmental attorney and staff to U.S. Rep. Henry Waxman. The candidates answered questions on greenhouse gas emissions, water shortage, and housing. Greenhouse Gas Emissions On greenhouse gas emissions, Horvath said she thinks supervisors should double down on accomplishing the county’s existing “Our County” Plan, …