Q&A: Urban doom loop—what it is and how cities can stop it

Recent images of downtown San Francisco—emptied of office workers now dialing in remote and filled with wandering homeless people—has struck fear for the future of urban areas. A Columbia University professor coined the ...

Portugal, Spain battle wildfires amid heat wave alerts

Hundreds of firefighters were on Tuesday battling a wildfire that has burned for four days in Portugal, which, like neighboring Spain, is sweltering in a heat wave that has triggered widespread weather alerts.

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