“The warning about extinction is stark. It is remarkable that global scientists had not anticipated a giant buildup of methane in the atmosphere when it had been so clearly predicted 10 to 20 years ago and has been shown to be critically linked to extinction events in the geological record (Kennett et al. 2003).”
Malcolm Light 9th February, 2012
http://arctic-news.blogspot.com/p/global-extinction-within-one-human.html
Versus current 2023 data: