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Pedestrians covering their faces walk on a street in New York, the United States on June 7, 2023. Smoke from raging wildfires in Canada has triggered air quality alerts in a number of U.S. states, with the sky over New York City quickly darkening Wednesday afternoon and New York State Governor Kathy Hochul calling the worsening air quality “an emergency crisis”. (Photo by Xinhua News Agency/Rex Features/Shutterstock)
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