Interesting. I had a dream the other night about realistic human-powered flight. One of those feather-light glider jobs with cellophane wings. You spend the first three hours on the ground pedaling like mad to charge a small battery, then with a combination of pedal power and battery you have enough oomph to get the thing to a realistic altitude (say 500'), switch to glider mode hopefully in an area with thermals, then pedal like crazy to charge the battery while hopefully the thermals keep you in the sky. Human powered! Of course the human in question would have to be a Lance Armstrong...
On a more realistic note though--what about Stirling engines as a charging backup for your mythical EV? They don't need fossil fuels, merely a heat source to operate, and that can be anything. They've been around for 200 years but they've remained more a curiosity (though they were used to run pumps in mines at one time).
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