Rating wealth by income (which this study does) is unusual and difficult. I don’t actually see any income numbers attached to their analysis which is suspicious.
Anyway, anyone with a net worth of around 90k USD is in that top 10%. Median net worth in the US was 127k in 2019. Which means that more than half of the 350M people in this country are in the worlds richest 10% (by wealth)
Picking a random American off the street gives you better than coin toss odds of finding a person in the “mega polluter” group you see in the thumbnail graph.
Even doing everything you can to “reduce carbon footprints” it’s still going to be orders of magnitude larger than a small village farmer in the middle of Nepal.
Doesnt mean it’s not worth doing, it just means there’s a lot more to be done.