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If we decide to switch over from coal power to more renewable sources, where will all of these solar panels and wind mills go? Well they may take up a lot of space, but at the same time so do the coal mines. If we just stop mining for coal we can use all of the space being used for those mines and put in thousands of solar panels, and hundreds of windmills. So while space may be of concern, there would be virtually no extra space taken up by the new power sources.