All of them seem like non-sequiturs, they have little relation to each other or to the comment they reply to. The haber process doesn't require that the hydrog

All of them seem like non-sequiturs, they have little relation to each other or to the comment they reply to. The haber process doesn't require that the hydrogen comes from natural gas, and if you use other hydrogen sources and clean energy doesn't release CO2. From what I understand the popularity of natural gas simply comes from natural gas being one of the cheapest sources of energy. If you have cheap electricty you can just run a fuel-cell backwards, or electrolyse water. Electricity just happens to be more expensive than natural gas. Other processes will hit the same problem, since the overall energy requirement is the same. Whatever process we find needs the energy from somewhere.