Hi there, I have a group project where we are to create (theoretically) a reliable power supply system for rural under developed areas in certain parts of the world. Now our task is under electrical engineering so it must be related to the power and ways to generate power, minimise the cost and such... We are for sure going to use solar power in our report (as is everyone else) and wind power too. However what advice i am after is if anyone is aware of any other alternative sources of energy? Other forms of power that aren't too popular? We are going to consider ethanol to power a diesel electricity generator and many small things, like light dimmers, light bulbs with small solar panels, bio energy to generate electricity, using waste...and such. Would anyone be able to recommend other forms of sources that can generate electrical energy, but must be cost effective, not too difficult/time consuming to build (as in a hydro centre, power plants and the likes)...anything would be very much appreciated thanks.