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Concentration of Negative Oxygen Ions in the Air in the Downtown Area of Pu'er was 14 Times Higher than the “Fresh Air” Standard

(People's Daily Online)    15:17, February 28, 2019

In 2018, the concentration of negative oxygen ions in the air in the downtown area of Pu'er was 14 times higher than the “Fresh Air” standard of the World Health Organization. The annual average value was higher than the “fresh air” standard defined by the World Health Organization. Pu’er was awarded the title of “China Natural Oxygen Bar”. Pu’er is the city with the highest concentration of negative (oxygen) ions currently available in China.

(For the latest China news, Please follow People's Daily on Twitter and Facebook)(Web editor: Hongyu, Bianji)

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