The supporters of Green Technology never tire of claiming that sunlight and wind are free and endlessly available and are therefore the obvious choice for the future of energy. The sun and wind are free, they say, and for that reason we should accept their claim that renewable energy will be the low-cost energy that will replace oil, coal and natural gas. But they omit an important fact. Critical components in the equipment that converts sun and wind into electricity depend on specific metals. Those metals have characteristics necessary for the function of the devices in which they are used. T...
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