Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
This, again, is likely due to the testing sites being farther from pollution sources than the UDAQ sensors.
Source: https://phys.org/news/2023-07-vehicle-idling-compound-local-pollution.html