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A person walks with a broom and dustpan during morning rush hour as Beijing, China, is hit by a sandstorm, March 15, 2021. REUTERS/Thomas Peter
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Residents make their way through a sandstorm in Beijing, Monday, March 15, 2021. The sandstorm brought a tinted haze to Beijing's skies and sent air quality indices soaring on Monday. (AP Photo/Ng Han Guan)
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A woman walks on a street as the city is hit by a sandstorm, in Beijing, China March 15, 2021. REUTERS/Tingshu Wang
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A man walks on a street during a sandstorm in the financial district in Beijing on March 15, 2021. / AFP / NICOLAS ASFOURI
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Residents make their way through a sandstorm in Beijing, Monday, March 15, 2021. The sandstorm brought a tinted haze to Beijing's skies and sent air quality indices soaring on Monday. (AP Photo/Ng Han Guan)
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People ride bicycles across an intersection amid a sandstorm during the morning rush hour in Beijing, Monday, March 15, 2021. The sandstorm brought a tinted haze to Beijing's skies and sent air quality indices soaring on Monday. (AP Photo/Mark Schiefelbein)
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Cars drive along an expressway amid a sandstorm during the morning rush hour in Beijing, Monday, March 15, 2021. The sandstorm brought a tinted haze to Beijing's skies and sent air quality indices soaring on Monday. (AP Photo/Mark Schiefelbein)
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A woman crosses a road during a sandstorm in Beijing on March 15, 2021. / AFP / WANG Zhao
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People walk across a street as capital city is hit by polluted air and sandstorm in Beijing, Monday, March 15, 2021. The sandstorm brought a tinted haze to Beijing's skies and sent air quality indices soaring on Monday. (AP Photo/Andy Wong)
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A woman cycles along a street during a sandstorm in Beijing on March 15, 2021. / AFP / Noel Celis
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Commuters walk along a sidewalk amid a sandstorm during the morning rush hour in the central business district in Beijing, Monday, March 15, 2021. The sandstorm brought a tinted haze to Beijing's skies and sent air quality indices soaring on Monday. (AP Photo/Mark Schiefelbein)
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A woman walks past Drum Tower during morning rush hour as Beijing, China, is hit by a sandstorm, March 15, 2021. REUTERS/Thomas Peter TPX IMAGES OF THE DAY
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A man walks on a street smoking a cigarette during a sandstorm in the financial district in Beijing on March 15, 2021. / AFP / NICOLAS ASFOURI
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People walk on a street during a sandstorm in the financial district in Beijing on March 15, 2021. / AFP / NICOLAS ASFOURI
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A woman wearing a face mask to help curb the spread of the coronavirus stands against the China Central Television (CCTV) building as capital city is hit by polluted air and a sandstorm in Beijing, Monday, March 15, 2021. The sandstorm brought a tinted haze to Beijing's skies and sent air quality indices soaring on Monday. (AP Photo/Andy Wong)
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Road workers go about their day in Beijing, China, as the city is shrouded in haze after a sandstorm, March 15, 2021. REUTERS/Thomas Peter
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A woman walks her dogs during a sandstorm in Beijing, Monday, March 15, 2021. The sandstorm brought a tinted haze to Beijing's skies and sent air quality indices soaring on Monday. (AP Photo/Ng Han Guan)
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Motorists commute on a road during a sandstorm in Beijing on March 15, 2021. / AFP / GREG BAKER
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A general view of the city shrouded in smog after a sandstorm, in central Beijing, China March 15, 2021. REUTERS/Tingshu Wang
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A woman uses a mobile phone to take photographs outside the Forbidden City during a sandstorm in Beijing on March 15, 2021. / AFP / WANG Zhao
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A woman walks on a street during a sandstorm in the financial district in Beijing on March 15, 2021. / AFP / NICOLAS ASFOURI
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A cyclist and motorists move past office buildings amid a sandstorm during the morning rush hour in the central business district in Beijing, Monday, March 15, 2021. The sandstorm brought a tinted haze to Beijing's skies and sent air quality indices soaring on Monday. (AP Photo/Andy Wong)
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A woman wearing a face mask reacts from a sandstorm as she walks across a street in Beijing, Monday, March 15, 2021. The sandstorm brought a tinted haze to Beijing's skies and sent air quality indices soaring on Monday. (AP Photo/Andy Wong)
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A resident rides through a sandstorm in Beijing, Monday, March 15, 2021. The sandstorm brought a tinted haze to Beijing's skies and sent air quality indices soaring on Monday. (AP Photo/Ng Han Guan)
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People walk near the entrance of the Forbidden City during a sandstorm in Beijing on March 15, 2021. / AFP / NOEL CELIS
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People cross a street during a sandstorm in Beijing on March 15, 2021. / AFP / Noel Celis
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A sweeper walks with a broom along a road during morning rush hour as Beijing, China, is hit by a sandstorm, March 15, 2021. REUTERS/Thomas Peter
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Residents make their way through a sandstorm in Beijing, Monday, March 15, 2021. The sandstorm brought a tinted haze to Beijing's skies and sent air quality indices soaring on Monday. (AP Photo/Ng Han Guan)
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People walk along a street during a sandstorm in Beijing on March 15, 2021. / AFP / Noel Celis
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People commute along a street during a sandstorm in Beijing on March 15, 2021. / AFP / Noel Celis
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A general view of the city shrouded in smog after a sandstorm, in central Beijing, China March 15, 2021. REUTERS/Tingshu Wang