„If we do not cut emissions, we face even more devastating consequences, as unchecked they could raise global average temperature to 4C or more above pre-industrial levels by the end of the century. The shift to such a world could cause mass migrations of hundreds of millions of people away from the worst-affected areas. That would lead to conflict and war, not peace and prosperity. … We also underestimated the potential importance of strong feedbacks, such as the thawing of the permafrost to release methane, a powerful greenhouse gas, as well as tipping points beyond which some changes in the climate may become effectively irreversible.“
— Nicholas Stern, Baron Stern of Brentford
[http://www.theguardian.com/environment/2014/feb/13/flooding-storms-uk-climate-change-lord-stern?CMP=EMCNEWEML6619I2 "Flooding and storms in UK are clear signs of climate change, says Lord Stern. Author of 2006 report says recent weather is part of international pattern and demonstrates urgent need to cut carbon emissions"], The Guardian (13 February 2014).