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What is the ranking of negative oxygen ions in Zhanjiang in China?
Ranked first in the country. Zhanjiang's air quality has been in the forefront of the country for many years. No matter in the beach or in the countryside, the average number of negative oxygen ions per cubic centimeter is 8000, which is four times higher than the standard of per cubic meter 1500 air issued by the World Health Organization. Therefore, Zhanjiang's negative oxygen ions rank first in the country.
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