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?

Why the snipe at the end? Perhaps they would buy plant based food instead. What you’re describing sounds like a wi for everyone.

The bottom fifth of incomes spend the most on the lotto. It would stand to reason they would spend more if given the means to.

Carbon taxes apply to all GHG, including methane. We just use "carbon" as the unit.

I don't know every carbon pricing scheme in the world, but I have never heard of any that would involve agricultural methane.

The EU ETS, which is not a carbon tax, but an emission trading system, but which is the largest carbon pricing scheme in the world, does not include methane at all. The EU has just decided that they want to start monitoring methane emissions, but that's about it. They have no plans right now to regulate or price methane emissions.