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<http://webisa.webdatacommons.org/71010188>	<http://www.w3.org/ns/prov#value>	"Dennis Kuzara says: October 19, 2012 at 10:08 pm Lester Via says: The cheapest way to produce hydrogen is from methane and it would be cheaper and more energy efficient to use methane directly as the fuel rather than to produce hydrogen from it." .