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My high-yield gas burning central heating unit exhausts almost no CO or other greenhouse gases.
Most of the exhaust heat gets used to heat the intake air, so on cold days it does not even reacjh boiling point and condense drips down into a container. It is pretty much clean water.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
  lifetime FE over 0.2 Gigameter or 0.13 Megamile.
For confirmation go to people just like you.
For education go to people unlike yourself.
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