The Planet Money episode is about a revenue neutral carbon tax. UBI funded carbon tax doesn't make any sense to tie those 2 things together. Carbon emissions would decrease with a carbon tax, but the amount of revenue needed for UBI would stay roughly the same. This means we would need to tax carbon even more. This would create a feedback loop where energy is prices explode uncontrollably. Basically, if you live in Alaska and need to heat your house and drive a truck, you're basically screwed.