The present level of greenhouse gases is enough for an ice-free planet

KNOWN BEHAVIOUR: \n<img src="https://4billiondead.org/wp-content/uploads/2026/04/jpg-version-2.jpg" alt=...

Five independent fits of Earth’s natural CO₂–temperature relationship — derived from different archives, different methods, and different timescales — all land in the same tier. That relationship holds from the depths of the ice ages to warm greenhouse climates with no continental ice, across 66 million years of Earth history. The modern trajectory departs from it at 1850 and has not looked back. The departure is not subtle, not a matter of interpretation, and not an artifact of any single dataset or method. It is unmistakable.

Dean Rovang, April 6, 2026

Read the entire post: https://justdean.substack.com/p/human-caused-climate-change-is-unmistakably