Oxfam Confronting Carbon Inequality [pdf]
assets.oxfamamerica.org
assets.oxfamamerica.org
Anyone above 38k USD per year of gross earnings falls within the top 10%, and for North America (US & Canada) the equivalent-CO2 emissions per capita[0] are between 50% and 300+% higher than EU countries, which means we the 10%-related emissions are overwhelmingly related to a population within which HN is likely to be a subset.
For anyone in a rush, the summary on page 2 is pretty decent. A couple more pages (3 and 4) give a fuller overview of the situation. The subsequent pages go further into a breakdown and a bit of a "now what?", which is in line with the last bits of the summary.
[0] https://worldpopulationreview.com/country-rankings/carbon-fo...