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A private security guard is seen behind a mesh screen at a construction site enveloped in smog and dust in New Delhi, India, Wednesday, November 4, 2020. The national capital, one of the world’s most polluted cities, enjoyed a respite from air pollution up until September in part thanks to a virus lockdown. But with industrial activities resuming and cars back on the roads — along with the onset of cooler weather and less wind, air quality in the city has once again fallen to unhealthy levels. (Photo by Altaf Qadri/AP Photo)
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