one kilogram of H2 replaces one gallon of gasoline
1 kg of H2 consumes 11 liters of fresh water during production
11 liters of fresh water is about 3 gallons
369 million gallons of gasoline per day (used in the USA) >>> 369 million kg of H2 per day >>> 1.1 billion gallons of fresh water per day
there are 128 trillion gallons of somewhat fresh water in Lake Erie
Lake Erie will last us 116,364 days (aka 319 years),....
well, the math works,.....
