The paper is here
Thanks to @KoboldCoterie@pawb.social for highlighting this bit:
Then there were “super-emitters” with extremely high overall greenhouse gas emissions, corresponding to about the top 0.1 percent of households. About 15 days of emissions from a super-emitter was equal to a lifetime of emissions for someone in the poorest 10 percent in America.
US population is about 340 million, so 34 million in the top 10% and 340,000 in the 0.1% super-emitters