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the claim

Current CO2 levels are higher than any time in the past 800,000 years.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
6 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that current CO2 levels are higher than any time in the past 800,000 years?

Yes. One reference work states that, based on ice core evidence, current CO2 concentrations exceed the past maximum within the 800,000-year record by about 41 percent. Several other sources partially support the claim, reporting that current CO2 is higher than at any time in the ice-core record or in millions of years.

Verdict: SUPPORTED · 6 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 6
How was it possible that CO2 levels were higher nearly 650,000 years ago?
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How was it possible that CO2 levels were higher nearly 650,000 years ago?. (n.d.). earthscience.stackexchange.com. https://earthscience.stackexchange.com/questions/9835

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More for · 5
Encyclopedia of the Anthropocene
2017
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Encyclopedia of the Anthropocene. (2017). play.google.com. https://play.google.com/store/books/details?id=dM8mDwAAQBAJ&source=gbs_api

Carbon Dioxide - Earth Indicator - NASA Science
Get citation
Carbon Dioxide - Earth Indicator - NASA Science. (n.d.). science.nasa.gov. https://science.nasa.gov/earth/explore/earth-indicators/carbon-dioxide/

Data from: CO2 alters community composition and response to nutrient enrichment of freshwater phytoplankton
2015
Get citation
Etienne, L., F., F. G., & Graham, B. (2015). Data from: CO2 alters community composition and response to nutrient enrichment of freshwater phytoplankton. zenodo.org. https://doi.org/10.5061/dryad.68434

Environmental Economics and Ecosystem Services
2025
Get citation
Bluffstone, R. (2025). Environmental Economics and Ecosystem Services. play.google.com. https://play.google.com/store/books/details?id=AnqNEQAAQBAJ&source=gbs_api

Weather Almanac 2026: The perfect gift for nature lovers and weather watchers
2025
Get citation
Johnson, Z. & Books, C. (2025). Weather Almanac 2026: The perfect gift for nature lovers and weather watchers. play.google.com. https://play.google.com/store/books/details?id=5zFdEQAAQBAJ&source=gbs_api

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