Sustainable energy is defined as energy which, in its production or consumption, has minimal negative impacts on human health and the healthy functioning of vital ecological systems, including the global environment, and that can be supplied continuously to future generations on earth. Such forms of energy include, but are not limited to the following: solar thermal, solar photo-voltaic (PV), wind, hybrid wind-solar, fuel cell, geothermal, small-scale (mini- and pico-) hydro-electric, tidal and wave. This definition specifically excludes nuclear and fossil fuel energy or their “improvements” as an option thereof.