However, correlate per capita emissions with per capita economic output and the calculus changes. The US also has one of the highest per capita economic outputs

However, correlate per capita emissions with per capita economic output and the calculus changes. The US also has one of the highest per capita economic outputs of the world. Suggesting that a million people in Yemen (producing very little) should have the same CO2 allowance as the US is just strange. The question isn’t about per capita output of CO2, but of per capita economic value created from that output. If a Yemeni farmer outputs x and an American farmer outputs 10x, but the American farmer is producing 15x the amount of food, we that means that 10x CO2 is a net gain, because we are getting significantly more food per x output. That would mean the Yemeni farmer should produce less CO2 since they are using it so inefficiently compared to an American farmer. In other words, fossil fuel buses produce more pollutants than a car, but they move move dramatically more people per unit of pollution. Suggesting per capita CO2 should be equal across the world is saying that a bus should emit the same as a car, despite a bus being more efficient per passenger than a car.