On January 30, the sound of firecrackers entered the ears, which was called the New Year. Banning guns or anything is nonsense, and shutting down more chemical plants and driving fewer cars can alleviate PM2.5.

The smell of gunpowder is not PM2.5, it is the smell of the New Year!

"University Diary" 1.30 is in the middle of the hand, please wait a moment,

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