I don't think there's a lot of value in putting limits on individuals. That's not an effective way to change the problem at scale. But FWIW, the average American can an annual carbon footprint of 16-17 metric tons of CO2. Here's some back of the napkin math estimating my annual carbon footprint:
750 kg (home energy) + 50 kg (public transportation) + 3,000 kg (flights) + 2,000 kg (diet) + 500 kg (shopping and waste) = 6.3 metric tons of CO2 per year, not bad for someone from a developed country.
750 kg (home energy) + 50 kg (public transportation) + 3,000 kg (flights) + 2,000 kg (diet) + 500 kg (shopping and waste) = 6.3 metric tons of CO2 per year, not bad for someone from a developed country.