Please have a look at the following (copied from a recent comment of mine): Most recent study of methane flux/storage in the ESAS: http://rsta.royalsocietypub

Please have a look at the following (copied from a recent comment of mine): Most recent study of methane flux/storage in the ESAS: http://rsta.royalsocietypublishing.org/content/373/2052/20140451 http://rsta.royalsocietypublishing.org/content/373/2052/2014... Arctic temperatures are estimated to rise 1.9x compared to global average: http://onlinelibrary.wiley.com/doi/10.1029/2005GL025244/full http://onlinelibrary.wiley.com/doi/10.1029/2005GL025244/full During HCO the arctic is estimated to have been 4-6C warmer than baseline (yearly average): https://epic.awi.de/38441/1/Beierlein_2015_Holocene_page1.pdf https://epic.awi.de/38441/1/Beierlein_2015_Holocene_page1.pd... That's not all that much. We're now already at 400ppm CO2, and recent unmitigated projections to 2100 (538ppm) simulate an arctic yearly average of ~ plus 8C: http://climatenewsnetwork.net/arctic-is-set-to-reach-13c-by-2100 http://climatenewsnetwork.net/arctic-is-set-to-reach-13c-by-... So, are you willing to play the russian roulette game with the arctic methane? The PETM boundary showed a global average warming of 5C, mostly from arctic methane at a time where there wasn't even a large ice shelf, so with significantly lower capacity: https://en.wikipedia.org/wiki/Paleocene–Eocene_Thermal_Maximum https://en.wikipedia.org/wiki/Paleocene–Eocene_Thermal_Maxim... That would be in addition to the CO2 induced warming, mind you. That should make it quite easy to see how we're likely triggering a rapid warming to +8C (global average) or above. Rapid means it could come within a single decade since methane is that potent. At that point, vast amounts of land on earth becomes uninhabitable from the heat aspect alone, never mind food production - you'll have mass migrations that top anything human history has ever seen. I suggest reading up on history as well, especially the late bronze age collapse which seems very interesting in its modern relevance.