Climate change already impacting migration patterns around the world

Climate change is already contributing to an increase in migration around the world, a report released Wednesday shows, as events ranging from rising seas to droughts make parts of places like coastal Bangladesh and Pacific Island nations uninhabitable.

There is no widespread consensus on how many climate refugees will be created in the coming decades. The United Nations estimates 200 million by 2050, while other estimates run as high as 1 billion.

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