Carbon dioxide (CO2), the No. 1 greenhouse gas leading to man-made global warming, has reached a dubious new milestone.
원문출처 : https://www.cnn.com/2018/05/03/us/dangerous-co2-record-wxc/index.html
원문출처 : https://www.cnn.com/2018/05/03/us/dangerous-co2-record-wxc/index.html