As poplar and willow catkins begin drifting across many urban roads in Beijing this spring, the city has launched prevention and control efforts using a combination of technological measures to reduce disruptions to daily life, including the use of the coagulant and the portable

As poplar and willow catkins begin drifting across many urban roads in Beijing this spring, the city has launched prevention and control efforts using a combination of technological measures to reduce disruptions to daily life, including the use of the coagulant and the portable

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