Environment & Energy

At least that would be less of a greenhouse gas threat.

DME has an atmospheric half life of about 5 days.

Interestingly the hydrogenation of carbon dioxide to make methanol, DME, and/or methane is exothermic, even if the entropy may be assumed to slightly negative as five gas molecules are reduced to three gas molecules in the methane case, nine gas molecules to seven in the DME case. If the generated heat is not recovered in some way, the exergy loss is increased, although I often reflect on using these reactions to drive heat engines, thus recovering exergy.

The point is, all the fossil fuel marketing going on here rebranding those fuels as "hydrogen" notwithstanding, all this will only make the climate disaster worse, faster.