A mystery source of banned, ozone-destroying chemicals has been pinpointed to eastern China.
원문출처 : https://www.cnn.com/2019/05/22/health/china-cfc-pollution-environment-intl-scn/index.html
원문출처 : https://www.cnn.com/2019/05/22/health/china-cfc-pollution-environment-intl-scn/index.html