We’re used to talking about migration in economic terms, or for asylum seekers in language of threat and safety – but some scientists believe climate may become the biggest, irreversible driver for the mass movement of millions of people by the end of the century. Despite increased pledges and targets to tackle climate change, the world is currently on course for warming of around 2.7% by then, far above the Paris Agreement of 1.5%. Kate Lamble examines a new report which attempts to quantify the human cost of climate change, and where it would no longer be safe to live.

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