actually, I meant to type “planet change” but yeah- when the plants die it sure changes the planet
Some theories now that an asteroid impact didn’t cause the atmospheric change that killed the dinosaurs, but that the change was triggered by massive volcanic and/or methane eruptions or releases, perhaps from undersea
We know there is an entire dead frozen trapped continent under the Antarctic ice shelf with mountains, valleys and rivers- the piri reis map and other modern sources
I took right off in spite of your typo didn't I? LOL
While looking for charts of Triassic period CO2 levels (didn't find them although I've seen them before, hmmm) I saw other theories about bacteria causing the massive die-offs too. Plenty of theories but no solid conclusions.