There has been some GREAT debate on which form of 'renewable' electrical production fits small nations such as Singapore. I browsed the web and my geography notes, which came out with these sources of 'renewable' energy. Which do you think is best? Please poll! BY THE WAY... Ocean Thermal Energy is sometimes virtually unheard of, but it is somewhat like solar to absorb heat energy from the ocean to produce electricity. Saudi Arabia uses this form of renewable energy. A downside to this energy is that the infrastructure is extremely costly. I used 'renewable' with inverted commas as many sites online do NOT consider nuclear as renewable. Thanks!