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A person wearing a mask walks past as the air pollution engulfs the Kathmandu Valley, in Kathmandu, Nepal, 18 April 2023. Air pollution caused by forest fires and widespread crop burning in Nepal and neighboring countries has resulted in hazardous levels of fine particulate matter (PM2.5), affecting millions of people nationwide. Air pollution is linked to health problems such as respiratory infections, and cases are rising in Kathmandu, according to the Chest Infection Department of Bir Hospital. The Department of Environment issued a notice recommending citizens to wear masks and avoid outdoor activities. (Photo by Narendra Shrestha/EPA)
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