| web | https://www.nbcnews.com/science/environment/carbon-dioxide-earth-s-atmosphere-reaches-record-high-researchers-say-n1090356 |
| author | Denise Chow |
| publication | NBC News |
| date | 2019-11-25 |
| web | World Meteorological Organizat... | 2019-11-25 | ||
| web | Damian Carrington | The Guardian | 2019-11-25 |
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