https://www.sciencedaily.com/terms/permian-triassic_extinction_event.htm
Permian-Triassic extinction event
The Permian-Triassic (P-T or PT) extinction event, sometimes informally called the Great Dying, was an extinction event that occurred approximately 251.0...
permian triassic extinctionevent
https://www.futurity.org/triassic-extinction-volcanic-emissions-2337132-2/
Volcanic CO2 emissions triggered Triassic extinction - Futurity
Apr 14, 2020 - 201 million year ago, climate change wiped out nearly half of the species on Earth. New research shows volcanic CO2 emissions played a direct role.
co2 emissionstriassic extinctionvolcanictriggeredfuturity