Sun doesn’t shine 24/7, or not enough when it’s cloudy, and mostly important we have no way to store enough energy to build a lot of solar farms. If you fill a gigantic field with solar panels but in a particularly sunny day the city doesn’t need all that energy or they can’t store it anywhere, you have big problems. The solution is not filling every space possible with solar panels and windmills. It is replacing fossil fuel energy with cleaner energy that can go well with solar and wind energy. This kind of energy sources are hydroelectric and geothermal wherever possible, or nuclear in the other cases.
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