| http://www.w3.org/ns/prov#value | - Levels between 51-100 are considered moderate pollution, and anything over 100 is harmful to sensitive groups, including children and the elderly.If I were a track and field athlete, or a cyclist, or a participant in any other outdoor competition, I would be concerned that my performance (for many, a once-in-a-lifetime event) might be affected by the air quality.
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