I'm not proposing anything, just discussing. To me, the first question is "will this work?" not "is this just/fair." Fairness and justice have to come in too, b

I'm not proposing anything, just discussing. To me, the first question is "will this work?" not "is this just/fair." Fairness and justice have to come in too, but the first question to ask if you're deciding about creating a price system is "can we?" We can obviously do fuel taxes. We do. That correlates pretty directly to emissions (within the domain of driving), but... we have experience here. We know that the demand elasticity to price is low in the long term and extremely low in the short term. Ie, You need a very big/painful tax to achieve a relatively small decline in emissions. There are questions of fairness/justice in all scenarios. Proportionality to waste is one issue. Proportionality to income is another. Different people will have different perspectives. But, before we even get to those, the question to answer is "what's our incentive?" Which (imo)needs to be answered in terms of reduced emission volume.