2025 Study: ‘There Exists No Unequivocal Experimental Evidence For The CO2 Greenhouse Effect’

“…data on CO2 cannot be explained by the model of the greenhouse effect as the driver for temperature”

Today’s climate models assume there is a perpetual positive feedback as more CO2 is added to the atmosphere; CO2-induced warming produces more and more warming.

But Dr. Peter Stallinga uses empirical evidence-based data in his 2025 paper to determine the actual feedback sign is negative – and by a factor of two. This destroys the catastrophic runaway warming narrative.

“…feedback [from added CO2] is empirically found to be negative [by a factor of 2]”

The research emphasizes the statistical connection between CO2 and temperature is not consistent, shifting across different time periods or theoretical frameworks. For example, the paleoclimate relationship between CO2 and temperature may be 2000 ppm per K, whereas it is assumed to be 100 ppm per K over the last 60 years.

These wildly divergent relationships suggest that complex, varied physical processes influence the climate system rather than a single, dominant factor (i.e., rising CO2 emissions).

Ultimately, the study concludes that the greenhouse effect alone cannot adequately explain all observed atmospheric data.

“On a contemporary timescale, it is clear why the temperature has risen so little compared to the GHE model; CO2 simply does not have a large enough effect on temperature.”

Image Source: Stallinga, 2025

5 responses to “2025 Study: ‘There Exists No Unequivocal Experimental Evidence For The CO2 Greenhouse Effect’”

  1. Dan Pangburn

    Most in the Climate Science community claim that water vapor increase results from planet warming caused by CO2 increase. El Ninos demonstrate that this perception is incomplete; that water vapor increase can also cause warming. NASA/RSS have measured average global WV using satellite-based instrumentation since Jan 1981. The increasing trend of WV is about 1.5 % per decade which is more than expected from just temperature increase. Paleo assessments show no correlation between temperature and CO2. The conclusion is that the only significant human contribution to GMST increase is from the human contribution to the increase in water vapor.

  2. Petit_Barde

    Thanks for sharing this article.

    Indeed, empirical data shows no correlation or a negative correlation from CO2 to global temperatures (even if mostly weak), and this is true at any observable timescale.

    Reality is exactly at the opposite of the climate scam story telling which assumes, based on 0 fact, that there is a significant positive correlation from CO2 towards global temperatures.

  3. 2025 Study: 'There Exists No Unequivocal Experimental Evidence For The CO2 Greenhouse Effect' | Un hobby...

    […] K. Richard, Aug 25, 2026 in […]

  4. Hansi
  5. Jochen

    It would, in fact, be downright grotesque if a highly dynamic, hyper-complex, almost infinitely branched system such as the ‘climate’ (if ‘the’ climate even exists) were to react in any measurable way to a ridiculous 100 ppm difference in gas composition. Note: Planet Earth is not a snowflake!

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