Assertion: gas | /r/CapableOf | deliver 140,000 watt-hours per liter
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text: The utility of liquid fuels is clear: one gallon of gasoline contains as much energy as 55,000 gallons of water pumped uphill to the height of Hoover Dam and then dropped back through turbines, and the best batteries offer 200 watt-hours per kilogram of energy whereas gasoline delivers 140,000 watt-hours per liter, according to Caltech's Lewis.