Yeah, everything every individual or even individual country does doesn't matter in the grand scheme. That's kind of the problem (tragedy of the commons). One w

Yeah, everything every individual or even individual country does doesn't matter in the grand scheme. That's kind of the problem (tragedy of the commons). One way to break the tragedy of commons is to lead by example, take the societal high ground, pressure others to join and finally shun everybody that doesn't participate. E.g. Norway could press the stop button, they'd be poorer (but other countries aren't lucky and don't have any oil) it wouldn't reduce CO2 output much over the short term, but maybe that would put other countries on the path to do it as well. In general the more upstream the taxation the easier to implement (it would be easy to simply tax the oil an oil rig produces), while the tax income would be probably fairer distributed if the tax is at the more consumption level/downstream.