A carbon-tax funded UBI would be popular, but ideally wouldn’t funding from a carbon tax go towards sequestering the carbon and other green initiatives instead of giving it back to consumers to spend on high-carbon goods and services?
It’s essentially what we do today. High tax payers consume more and their tax revenues subsidize things like Ag which make things like meat affordable to poor people.
So yeah, get rid of subsidies and replace with UBI and we’re probably in nearly the same place. Maybe a good deal of people would forego newly expensive meat and spend their UBI on the lotto?