12/11/2015

New Yorkers track homelessness on social media, spur debate

On an app, pins on a New York City map chart sightings of homelessness, accompanied by photos of people lying on sidewalks, slumped in doorways, sitting on curbs with shopping carts piled high with bags. Hashtags frame the ...

China's gray smog has a blue lining: Air improves this year

Lawyer Wu Congsi has asthma and keeps air purifiers whirring away in his office, home and car to counter Beijing's hazardous smog. He prefers to stay inside unless the sky is blue. But this year, he's been able to regularly ...

Declining snowpacks may cut many nations' water

Gradual melting of winter snow helps feed water to farms, cities and ecosystems across much of the world, but this resource may soon be critically imperiled. In a new study, scientists have identified snow-dependent drainage ...

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