Number of people is what ultimately matters. The amount of CO2 per capita tends towards the same ballpark. Somewhere between 5-10 t/year/capita [0]. US, alas,

Number of people is what ultimately matters. The amount of CO2 per capita tends towards the same ballpark. Somewhere between 5-10 t/year/capita [0]. US, alas, is at 16t/year, though decreasing. Overall contribution: 330M * 16 = 5B t/year. Now let's watch how the 6 billion people that did not exist circa 1900 catch up in emissions with the high energy regimen that characterizes 'western middle class' lifestyle. Let's lowball at 5t/year/capita. Overall contribution: 6000M * 5 = 30B t/year. Earth as we know it will not survive that. And that's before we factor in that population is still booming, both globally and, through global migration, in US. [0] https://ourworldindata.org/grapher/co-emissions-per-capita?tab=chart&year=1805 https://ourworldindata.org/grapher/co-emissions-per-capita?t... [1] https://ourworldindata.org/grapher/world-population-by-world-regions-post-1820 https://ourworldindata.org/grapher/world-population-by-world...