Any worsening of air quality is. Noun [ u or s ] uk / ˈwɜː.s ə n.ɪŋ / us / ˈwɝː.s ə n.ɪŋ /. Deterioration, weakening, failing, fading, sinking, degeneration,. The process of becoming worse:
The process of becoming worse: Noun [ u or s ] uk / ˈwɜː.s ə n.ɪŋ / us / ˈwɝː.s ə n.ɪŋ /. Any worsening of air quality is. The process of becoming worse: Deterioration, weakening, failing, fading, sinking, degeneration,.
