US greenhouse gas emissions dropped dramatically in 2020, helping the country meet one of its long-standing climate targets. But the dip came at a great economic cost -- and experts warn that unless climate action becomes a priority, emissions will bounce back quickly.
원문출처 : https://www.cnn.com/2021/01/12/us/climate-us-emissions-2020-intl/index.html
원문출처 : https://www.cnn.com/2021/01/12/us/climate-us-emissions-2020-intl/index.html