Lastly, our approach allows us to also quantify transboundary impacts of wealthy emitters. For example, the emissions of the wealthiest 10% of US Americans and Chinese each led to a. 2-3 fold increase in heat extremes across vulnerable regions. 5/

These wealthy groups contributed much more to dangerous heat and drought events than the average person—up to 26 times more for the top 1% when it comes to extreme heat globally. And up to 17 times (top 1%) more to Amazon droughts. 4/

The richest 10% of people worldwide contributed to about two-thirds of global warming since 1990, and the top 1% alone about one-fifth. If the entire world had emitted like the bottom 50%, there would have been minimal warming since 1990. Lot more in there (check out this figure) 👇
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So what did we do? We combine wealth-based GHG inequality assessments from @wid.world and @lucaschancel.bsky.social with an emulator modelling framework to systematically attribute changes in global temperature and grid-cell-level climate extremes to emissions from different wealth groups. 2/