Temperatures may be rising globally, but not all of us feel the impact in the same way.

Over the past half century, climate change has increased inequality between countries, dragging down growth in the poorest nations whilst likely boosting prosperity in some of the richest, a new study says.

The gap between the world's poorest and richest countries is about 25% larger today than it would have been without global warming, according to Stanford University researchers in California.

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African countries in tropical latitudes have been the hardest hit, with the GDP per capita of Mauritania and Niger more than 40% lower than they would have been without the rising temperatures.