If you're trying to find the best cell phone network where you live, don't just rely on carrier coverage maps or speed claims -- which are often based on theoretical maximum output from cell towers.

CNN: Report: Verizon offers nation's fastest 4G service

The Tennessee Valley Authority (nyse: TVC - news - people ), a big Chattanooga employer, is taking the output from the 5-kilowatt solid oxide fuel cell that the center is experimenting with.

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