It's an enginering constraint.
Hail-proof wind power? Put them indoors, like Bucky Fuller advocated.
Hail-proof solar? Put the PV panels under ETFE pillows.
science.howstuffworks.com/environmental/conservation/conservationists/eden3.htm
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Three conspiracy theorists walk into a bar --You can't say that is a coincidence.
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