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Old December 4 2011, 07:14 PM   #24
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Re: Most liveable alien worlds ranked

That's what the second law of thermodynamics states. If you could make energy from heat your PC would use no electricity – you would use the heat generated by the CPU to power up the PC. And the heat generated by the EM radiation coming from the monitor. In the winter, you'd extract heat from the outside (reducing the temperature there) to make electricity and subsequently heat your home, again without any electricity.
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