There is no doubt that the most effective cures for greenhouse gas (GHG) emissions, thus the most effective methods of mitigating climate change are new technologies. For mobility these include:
- Battery-electric vehicles (of all types, preferably coupled with an ongoing reduction in the GHG emitted in the generation of grid power).
- Hydrogen-fueled electric vehicles (using fuel cells and hydrogen generated using mostly renewably generated power).
- Directly supplied electric vehicles (mostly trains, and ditto the parenthesis in the first bullet)
The problem with new technologies is that they take time to develop and more time to deploy. One shortcut method is using renewable fuels that are compatible with existing vehicle powerplants. That is the subject of this post.