China's raft of clean air policies saved hundreds of thousands of lives in 2017 alone, according to new research.
원문출처 : https://www.cnn.com/2019/11/19/asia/china-air-pollution-study-scli-intl-scn/index.html
원문출처 : https://www.cnn.com/2019/11/19/asia/china-air-pollution-study-scli-intl-scn/index.html