Ever wonder why renewable energy isn't catching on? Most would say greed and politics and that's probably true for the most part, but the argument made in this video is that it is an intermittent source of energy and isn't on-demand. If you need more energy, you can't just conjure up a wind storm or bring the sun back out, so you need to be able to store it somehow. This video talks about an amazing new technology developed at MIT called liquid metal batteries. Pretty awesome. Check it out!
http://www.ted.com/talks/donald_sadoway_the_missing_link_to_renewable_energy.html
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