Scientist have recently discovered a huge amount of methane release from noth pole melted ice.
Since it’s greeenhouse gas power is 20 times more than carbon dioxide, and the estimated amount of the gas that could be released is huge, scientists are really worried about the result of that, the article below in any case is really explicative, so go and read it!
http://www.independent.co.uk/environment/climate-change/exclusive-the-methane-time-bomb-938932.html
Again, this is really worring since the complete melting of the north pole ice may lead to really high level of global warming, and all the consequent disasters estimated by lot of scientists.
Just look at this document on the IPCC (Intergovernmental Panel on Climate Change) http://www.ipcc.ch/ipccreports/tp-climate-change-water.htm

