COVID-19의 확산 방지를 위한 외출 감소로 대기 오염이 완화된 캐나다의 도시들
eologists find lost fragment of ancient continent in Canada’s NorthAir pollution eases in 4 Canadian cities as pandemic measures keep people home
한글번역 : https://www.kosen21.org/info/globalNews/globalNewsDetail.do?articleSeq=NEWS_000000000000161
기사원문 : https://www.cbc.ca/news/politics/satellite-images-no2-smog-gta-vancouver-1.5516160