Hey, something I'm (becoming) an expert on!
Solar and wind energy are not sources of free energy. They require large amounts of land that will largely be unable to provide any other service, such as wildlife support. If trying to use solar energy as a primary energy source, the amount of land needed is astronomical and there really is no proven way to successfully accommodate the existing, complex, biological systems.
It is a good idea to integrate solar energy systems with existing buildings, that doesn't require the consumption of natural spaces. If you want cheap, clean energy that doesn't require a lot of land space, nuclear power is your only option.
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