Heat wave risk hovers over Paris Olympics

Scorching summer heat is hard to imagine now in mid-winter Paris, but in six months when the world's athletes arrive for the Olympics, another pounding heat wave would spell trouble for organizers.

Study quantifies how aquifer depletion threatens crop yields

Three decades of data have informed a new Nebraska-led study that shows how the depletion of groundwater—the same that many farmers rely on for irrigation—can threaten food production amid drought and drier climes.

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