Hydrogen, methane and carbon dioxide

Waste CO2, a by-product of obtaining fuel cell H2 from CH4 (now vented), is a greenhouse gas with applications, including water purification. It is proposed that it be trapped and used for this and/or other purposes with the intent of lowering costs of power, water purification and the cost of transition to a hydrogen energy economy as well as slowing the rate of growth of the atmosphere CO2 burden. (author)