Geologist Prof. Ian Plimer: “Carbon dioxide in the past has been much, much higher than now. We’re currently at 0.04%. For most of geological time, it was about 20%.”

Geologist Prof. Ian Plimer: "Carbon dioxide in the past has been much, much higher than now. We're currently at 0.04%. For most of geological time, it was about 20%."

"And during that geological time when we had high carbon dioxide, we had three of the six great ice ages. So… pic.twitter.com/Y6RwC0tGA9

— Wide Awake Media (@wideawake_media) August 27, 2025