The warming globe is both exposing and exacerbating existing inequalities, deepening what journalist David Wallace-Wells has called the “climate caste system.” Poorer countries, though they have emitted only a fraction of the greenhouse gases that richer countries have spewed, are suffering the worst of worsening weather. That’s because, in part, more of the poor countries are in the tropical areas—already hot to begin with—where climate change will make life harder to live and crops much harder to grow. A lot of these nations also have extensive coastlines, which make them especially
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