Sustainable energy...?

Question

what else is there besides wind, solar, geothermal, tidal, hydro

is there any else???

Answer 1

Biomass

Nuclear

NB: by definition Sustainable Energy is the provision of energy such that it meets the needs of the present without compromising the ability of future generations to meet their needs.

Answer 2

Bio diesel, or practically any organic fuel.  Hydrogen.  Compressed Air Technology.

Answer 3

I don't  think there is any more i think you have pretty much nailed but if your still not sure you could go onto google and check it out