China is the hotspot for ground-level pollution
https://www.sciencedaily.com/releases/2018/08/180829115557.htm
In China, the air that they are breathing is majorly polluted causing it to be more harmful than the United States, Europe and Japan. They had six times as many high ozone days as Europe. For the United States the standard health based level is 70ppb. In China it is up to 80ppb. The ozone has started affecting the crops as the air is not natural.
When reading this article, I found it interesting when the author said no one can tell how much pollution is in the air and it still is a bright blue sky.
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