博文
Solution for cleaner air confirmed
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No work, which means less traffic (and less factory productions of pollutants), and you have blue sky and white clouds day after day, at least in autumn.
https://blog.sciencenet.cn/blog-306792-729897.html
上一篇：蓝天，白云，不能不出游
下一篇：台风“菲特” 来了
