  We review the possibilities for in situ energy resources on Titan for use by
future humans, including chemical, nuclear, wind, solar, geothermal and
hydropower. All of these options, with the possible exception of geothermal,
represent effective sources of power. Combustion of methane (after electrolysis
of the native water), in combination with another source of power such as
nuclear, is a viable option; another chemical source of energy is the
hydrogenation of acetylene. The large seas Kraken and Ligeia potentially
represent effective sources of hydropower. Wind power, particularly at
altitudes ~40 km, is expected to be productive. Despite the distance from the
sun and the absorbing atmosphere, solar power is (as on Earth) an extremely
efficient source of power on Titan.
