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It would be nice to have a windmill on the roof to run an air compressor in the house. In the winter, it could help heat the house while compressing air for the car. In the summer it could heat the water in the water heater. Maybe it could also be used for cooking.
When the air expands in the car engine, it gets cold so it can be used for the air conditioner without using additional energy.
If the car has its own portable windmill, it could recharge itself just by parking in a windy area. It seems like a good way to keep driving when gasoline gets scarce.
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