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I just read an article about some entrepreneurs investing money into ways for producing power that do not rely on fossil fuels. A worthy cause in my opinion. The article mentions one aspect of the big picture, calling energy storage the "holy grail that will speed the green power revolution." Specifically the article mentions one approach: So it got me thinking that what we really need to do is come up with ways to store potential energy. We can collect solar and wind power during the day, but need ways to store it for use during the night, and days that are calm and cloudy. My first thought is to use gravity: pumping water into an elevated tank, then when needed we can release the water into a lower one, passing through turbines along the way. Could this be done on a scale small enough where each dwelling would have it's own mini hydro dam room? I would like to hear your own ideas, or perhaps you've heard of other existing concepts out there. How would you go about storing potential energy, to be converted into electricity on demand? Or am I way off on this potential energy thing? Article is found here: entrepreneurs-seek-path-to-fossil-fuel-free-future
