07-14-2009, 12:52 AM
Quote:No energy is renewable - that´s a law of thermodynamics. ´Uses a fuel with no better uses and which there is plenty of´ is probably what people mean by renewable.Notwithstanding my poor attempt at a humorous reply, you are correct. It would be beter to speak about 'sustainable' energy sources, I think. Wind energy would fail that criterium, if we would rely for 100% on it. Even though the total amount is 5 times the amount we need, at some point winds might not be able to deliver moisture where it's supposed to be. The same goes for (affordable) geothermal energy. It's only sustainable as long as you don't ask too much from it, or things will start to cool down.