The deployment of alternative fuel vehicles and alternative fuel infrastructure may lead to reductions in potentially harmful emissions. Many of the resources to which we provide access are applicable to the public transportation sector, as well as public and private fleets. Not all approaches are appropriate for every situation, and policymakers should focus on cost-effective and domestically available efficiency tools and alternative fuels. Also, policymakers should explore strategies for creating more fuel efficient fleets. See also fuel efficiency and fuel efficiency standards.