What's in Beijing smog? 1,300 microbe species, study finds

As if it weren’t bad enough to breathe already, a new study has detected traces of more than 1,300 species of microbes in some of Beijing’s most polluted air.Most of the microbes detected by scientists were harmless bacteria that are commonly found in soil.But the study found some bacteria and fungi that are known to cause allergies and respiratory diseases.

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