July 17 ** Commodity index 92.32
2023-05-28 03:08:00

** Commodity indices have risen by 0.896% in 11 days since 2013-7-7.
Filter in air purifiers are used to reduce the concentration of contaminants (including dust, pollen, pet dander, mold spores, dust mite feces, smoke particles and volatile organic compounds) found in the environment. These contaminants can act as allergens and pose a health risk. So, air purifier is useful and even necessary for people.
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