The US wouldn’t actually need to cooperate with other countries, the US GHG footprint is huge. Even considering just the US military, such a scheme would make a massive difference.
If implemented US-wide, it would obviously be an issue how you then tax (cheap) imports made with fossil fuels (which incidentally is a question the EU is already pondering) and what to do about your exports. But it should definitely be possible.
The US wouldn’t actually need to cooperate with other countries, the US GHG footprint is huge. Even considering just the US military, such a scheme would make a massive difference.
If implemented US-wide, it would obviously be an issue how you then tax (cheap) imports made with fossil fuels (which incidentally is a question the EU is already pondering) and what to do about your exports. But it should definitely be possible.