Nine out of every 10 people on the planet breathe air that contains high levels of pollutants and kills 7 million people each year, according to a new study from the World Health Organization.
원문출처 : https://www.cnn.com/2018/05/01/health/air-pollution-cities-who-study/index.html
원문출처 : https://www.cnn.com/2018/05/01/health/air-pollution-cities-who-study/index.html