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If few will pay for it, then even fewer will pay for more expensive and less efficient mobile units.

Who is going to pay for a lot of extra power and reduced driving range for the idea in the article, the power costing far in excess per year than planting two trees (which would do more for the environment)?

Anyone can, that's actually another benefit. It can be funded by anyone who wants to.

Then we're at the tragedy of the commons and no one will.

Well ... yes?

I's clear that with many environmental matters, and specifically atmospheric CO2, we are at the tragedy of the commons, and have been for a long while, and strategies should be around getting us out of there.