介绍:
In an effort to reduce air pollution, Xi'an recently bought a "Smog Cannon", an air-assisted machine that sprays fine water drops to over 70 meters high. The 900,000 yuan machine was installed on a truck so it can move around in the city from 8:30 am to 6pm every day.
The local government says it reduces smog in the city. Does it really work?
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