Follow the molecules

Regarding “Hydrogen use as a green fuel source heats up,” (B4, Nov. 24): The article points out that producing hydrogen by the current process of reforming methane (natural gas) also produces a lot of carbon dioxide, a greenhouse gas. Electrolysis of water can produce “green” hydrogen, but only if the electricity is produced from green sources, i.e.. wind, solar, or hydro. The use of electrical energy in place of burning fossil fuel is a positive step only — repeat only — if the electricity is generated from renewable energy. Recently, I have seen reports of municipalities banning connection of natural gas supply for residential heating and requiring electrical heating only. What is the source of that electrical energy? If it is a fossil-fueled generation station, the result of the restriction will be increased production of green house gas. The replacement of gasoline-fueled automobiles by electric vehicles promises a huge reduction in greenhouse-gas emission. But what is the source of the electricity? If it is a fossil-fueled power plant, the reduction is greatly reduced or may even be an increase. Louis DuPree, Magnolia