Workers treat a willow tree to reduce catkins in Beijing. The city aims to treat 400,000 female poplars or willows to reduce catkins, the cotton-like seed clusters that fill Beijing’s air in springtime. (Photo: China News Service/Jin Shuo)
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Workers treat a willow tree to reduce catkins in Beijing. The city aims to treat 400,000 female poplars or willows to reduce catkins, the cotton-like seed clusters that fill Beijing’s air in springtime. (Photo: China News Service/Jin Shuo)
