Latest risk assessment for our rapidly heating world:

At 3.6 - 4.4°C — 4.5 billion people will be “outside of [the] historical climate niche posing an existential risk” to them

At 2.7°C — 3 billion people

“It exposes almost the entire area of some countries (eg, Burkina Faso, Mali) to unprecedented heat, including some Small Island Developing States (eg. Aruba, Netherlands Antilles)—a group with members already facing an existential risk from sea-level rise.”

Source: https://www.nature.com/articles/s41893-023-01132-6#Fig5

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