When Will We See a Solar-Powered Steel Smelter?

The renewable energy industry is as heavily reliant on fossil-fuelled vehicles and installations as Saudi Arabia is on oil. Is anyone working to change this? When will solar-powered steel furnaces replace the coal-fuelled ones and when will start Caterpillar making solar/hydrogen/battery-powered mining trucks? Now, these are guzzlers!

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I guess it's the difference between the way things transform when they're controlled by a state and when they are publicly listed and controlled by the market. In North America, this will change only when it makes economic sense. 

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Ah, but before that all subsidies must go, so things are really controlled by the market with no participation by the state. Subsidies are a direct state interference, not that this is invariably a bad thing, of course. 

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