“Okay, so without a power source, what generates the microwaves?”
Well, the gasified poop is going to power a fuel cell to generate electricity, which they then hope to use to power the microwaves to make more gasified poop. Guess they will have to charge up the fuel cell some other way first to get the process rolling.
Unless they think they can violate the laws of thermodynamics, some amount of energy other than that necessary to ‘get the process rolling’ willneed to be added to this system. NO process which utilizes energy is 100% efficient.
Then again, Bill Gates IS very wealthy. Maybe he can bribe the ‘Thermo-gods’ into allowing him to ignore those pesky physical laws.