Fact #6
CO2

Our current geologic period (Quaternary) has the lowest average CO2 levels in the last 600 million years

Contrary to the oft-repeated mantra that today’s CO2 concentration is unprecedentedly high, our current geologic period, the Quaternary, has seen the lowest average levels of carbon dioxide since the Precambrian. Though CO2 concentrations briefly peaked 320,000 years ago at 300 ppm, the average for the past 800,000 years was 230 ppm (Luthi 2008). The average CO2 concentration in the preceding 600 million years was more than 2,600 ppm, nearly seven times our current amount and 2.5 times the worst case predicted by the IPCC for 2100. Our current geologic period (Quaternary) has the lowest average CO2 concentration in more than 600 million years.

Explore Our Kids Zone!

Under Construction, Come back soon!

Take Our Climate Quiz!

The Great Climate Change Debate is one of the “hottest” issues before the public and policy makers today. How much to you know about the subject? Or possibly, the real question is one attributed to American humorist Will Rogers:

“It ain’t what you don’t know that gets you into trouble. it’s what you know for sure that just ain’t so.”

Find out your Climate IQ by taking our Climate Quiz: the answers may surprise you.

Take the Quiz Now →

Join our effort to build a greener future.