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Water & the Hydrogen Economy

Back-of-the-envelope calculation of the amount of pure water required, per annum, to fuel the world's transportation infrastructure in a hydrogen economy: 3.7 x 10^13 metric tonnes = 3.7 x 10^13 kilolitres; in addition to 1.674 x 10^13 KWh of electricity for industrial electrolysis, assuming a 25% rate-of-efficiency in the conversion.

By comparison, Lake Superior contains approximately 1.21 × 10^13 metric tonnes of water, and the current world consumption of crude oil for transport is 1.705 x 10^9 metric tonnes/annum.



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