India has the world's worst air pollution. Home to 21 of the world's 30 most polluted cities, its toxic air kills more than one million people each year.
원문출처 : https://www.cnn.com/style/article/carbon-tiles-air-pollution-india-hnk-spc-intl/index.html
원문출처 : https://www.cnn.com/style/article/carbon-tiles-air-pollution-india-hnk-spc-intl/index.html