Very large release of mostly volcanic carbon during the Paleocene–Eocene Thermal Maximum User SvanteArrheniusAMA, in the Climate Change Science and News subreddit, 22 Nov 2017
Very large release of mostly volcanic carbon during the Palaeocene–Eocene Thermal Maximum User Vailhem, in the ClimateNews subreddit, 31 Aug 2017
Very large release of mostly volcanic carbon during the Palaeocene–Eocene Thermal Maximum User EcoInternetNewsfeed, in the EcoInternet Climate Change and Environment News subreddit, 31 Aug 2017