The Board of Supervisors on Tuesday approved resolutions that give property owners in unincorporated areas access to clean-energy financing in the form of county loans paid back through property-tax bills. The property-assessed financing was developed in 2008 to make it easier to fund energy-efficiency, water-conservation and renewable-energy improvements to homes and commercial buildings. As Marin updates its climate action plan, increasing its 2006 goal to achieve a 30 percent reduction in greenhouse gas emissions compared…