CO2 Levels Are Now Comparable to What They Were 4 Million Years Ago, Says NOAA
CO2 Levels Are Now Comparable to What They Were 4 Million Years Ago, Says NOAA
Concentrations of carbon dioxide in the atmosphere in May were 50 percent higher than during the pre-industrial era, reaching levels not seen on Earth for about 4 million years, the main US climate agency said on Friday.
https://www.sciencealert.com/co2-levels-are-now-comparable-to-what-they-were-4-million-years-ago-says-noaa