Sitka's two hydroelectric dams supply much of its power, but supplemental diesel fuel is still necessary. To lower Sitka's fossil fuel use and reduce its carbon footprint, the Sitka Conservation Society has worked to keep year-round messages of energy conservation and efficiency in local and regional media.  Using public service announcements, articles in the local newspaper, and presentations to local government offices, SCS has informed residents about state weatherization programs, local energy updates, utility changes, and simple home weatherization projects.