[Rockhounds] Forgot URL - 100,000 billion metric tons of CO2 choked Earth’s life 252 million years ago

[Paul]

I forgot URL to open access paper. It is:

Ragon, C., Vérard, C., Kasparian, J., Nowak, H., Kustatscher, E. and Brunetti, 
M., Comparison between plant fossil assemblages across the Permian-Triassic 
Boundary and simulated biomes. Frontiers in Earth Science, 13, p.1520846.
https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2025.1520846/full

Yours,

Paul H.