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  1. 19879

    Although multinational agreements on global warming try to spread the burden among all nations, data from the MILAGRO project in Mexico City suggest that the major responsibility for excess production of greenhouse gases and other pollutants lies with the megacities, which constitute a rather small number of culprits and ones that not all nations possess. […]

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  2. Earth

    What Goes Up

    A massive scientific field study in Mexico City, along with lab experiments and computer simulations, show that pollution from the world's megacities has a global impact.

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  3. Bipolar Express: Mental ailment expands rapidly among youth

    Diagnosis of bipolar disorder in kids and teenagers has dramatically increased since 1994, raising concerns that this severe mood disorder is being overdiagnosed.