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Climate change could push more than 200 million people to leave their homes in the next three decades and create migration hotspots unless urgent action is taken to reduce global emissions and bridge the development gap, a World Bank report has found. The second part of the Groundswell report published on 13 September 2021 examines how the impacts of slow-onset climate change such as water scarcity, decreasing crop productivity and rising sea levels could lead to millions of what the report describes as “climate migrants" by 2050 under three different scenarios with varying degrees of climate action and development.