"When man first walked on the moon, the carbon dioxide concentration was 325 ppm.
This week, our planet hit the highest levels ever directly recorded: 430 parts per million."
https://www.cbc.ca/news/science/mauna-loa-observatory-430-record-1.7555100
This week, our planet hit the highest levels ever directly recorded: 430 parts per million."
https://www.cbc.ca/news/science/mauna-loa-observatory-430-record-1.7555100
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