An article in inhabitat.com describes the world's first molten salt solar plant, which just went online in Italy. The plant uses molten salt to store heat from the sun; the heat is used to produce steam to drive a turbine that generates power much in the same way a hydro-electric plant does. Because the molten salt has such high inertial heat, the plant can generate power around the clock.
The plant 5-megawatt plant cost sixty thousand euros to build; compare that to a nuclear plant, which would cost on average around 17 million euros to produce 5 megawatts. It's time people realize that renewable energy can be competive with nuclear. Solar and wind are good options for moving away from coal and oil.
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