I wouldn't count the Germans out. They were the first to utilize coal to oil back in WWII. Those MF's took on a host of nations during two world wars and almost won the second one. Personally when it comes to betting I find I generally do better not betting against them!

I really like the idea of stackable nuke reactors. They are small scale self contained units that can be dropped outside cities and towns all around the country. Completely self contained. Scalable. Best of all the ability to be mass produced (ie cheap!).

Solar and wind are feel goods but if we are serious about getting rid of emissions a great place to start is making electricity cheap and abundant. Incentivize people to switch to cheaper alternatives vs taxing them to reduce use.

Aviation is already in the crosshairs with multiple bills being introduced to tax airline emissions.