Assertion: matter's matter | /r/HasProperty | 28 μg/m3
Facets:
Source sentences:
text: The CCME standard for particulate matter 2.5 (PM 2.5 ) as of 2015 is 28 μg/m3 (calculated using the 3-year average of the annual 98th percentile of the daily 24-hr average concentrations) and