It's just a theory, but I liked that simplicity.
New world currency will not be some central bank crypto replacement of fiat money, it will be carbon footprint units.
Price of everything will be nominated in carbon footprint units.
Each citizen will be given (monthly?) a fixed amount of that carbon footprint points he could spend on goods and services.
So, UBI, paid by authorities in carbon footprint units CBDC will effectively control citizens in the name of climatehoax with all shitty consequences.
Just like that.
I saw something like this spelled out on UN website about 10 years ago. They were actually using electricity quotas as the means of backing the currency and at the time that was why they were pushing for smart meters. I'd say this is connected.