The Tulsa Area Clean Cities Coalition (TACC) promotes the use of alternative fuel vehicles to increase energy security, reduce fleet operating costs, and improve the environment while reducing petroleum use in the transportation sector. The Tulsa coalition is one chapter of the nationwide U.S. Department of Energy Clean Cities program, and serves as a resource for the eastern half of Oklahoma. TACC is hosted by INCOG, the regional planning authority for the Tulsa area. The program is member-supported, and funded by INCOG, the Oklahoma Department of Commerce, and the U.S. Department of Energy.