As millions of Americans are kept from work, school and most public places as coronavirus is on the rise, satellite images show pollution on the decline.
원문출처 : https://www.cnn.com/2020/03/23/health/us-pollution-satellite-coronavirus-scn-trnd/index.html
원문출처 : https://www.cnn.com/2020/03/23/health/us-pollution-satellite-coronavirus-scn-trnd/index.html