http://www.bbc.com/future/story/20171016...-is-coming
https://en.wikipedia.org/wiki/Arctic_methane_emissions
https://www.youtube-nocookie.com/embed/8Q_1FU-WRBo
https://en.wikipedia.org/wiki/Arctic_methane_emissions
Quote:The Permian–Triassic extinction event (the Great Dying) may have been caused by release of methane from clathrates. An estimated 52% of marine genus became extinct, representing 96% of all marine species.https://en.wikipedia.org/wiki/Arctic_met..._breakdown