- Greenhouse gases reach new peak in 2018, UN says AOL
- Climate change: Greenhouse gas concentrations again break records BBC News
- Carbon dioxide in Earth’s atmosphere reaches record high, researchers say NBCNews.com
- Carbon Dioxide Concentrations in Atmosphere Hit Record High, World Meteorological Organization Says Newsweek
- Carbon dioxide reaches record high in Earth’s atmosphere, scientists report USA TODAY
- View full coverage on Google News
Greenhouse gases reach new peak in 2018, UN says – AOL
