Selling Yunnan's fresh air could also be seen as a way to raise concern about the pollution issue, Hu Kailin, an environmental science expert said.

同时，环境科学专家胡凯琳表示，此次事件也可以提高人们对于空气污染的关注度。

youdao

Selling Yunnan's fresh air could also be seen as a way to raise concern about the pollution issue, Hu Kailin, an environmental science expert said.

同时，环境科学专家胡凯琳表示，此次事件也可以提高人们对于空气污染的关注度。

youdao