Medellin used to be the murder capital of the world. Today, new businesses, plazas, libraries and schools can be seen throughout the city's hillside neighborhoods. An aerial tram system is at the heart of Medellin's transformation.
Can we use vast amounts of data, machine learning, and other technologies to warn communities about the risk of water stress driving conflict?
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This Month in Climate Science summarizes significant new research and gives a clearer picture of the threats posed by climate change. Studies published in February 2019 reveal the first mammal extinction caused by climate change, shifting bird migrations, disintegrating clouds and more.