Limiting global heating to 2C was an arbitrary target, and appears to be [ too much heating for safety ]( http://www.theguardian.com/environment/southern-crossroads/2014/sep/09/new-york-climate-summit-two-degrees-warming-policy-disaster ) .
Ссылка: https://stallman.org/archives/2014-jul-oct.html#11_September_2014_%28Limiting_global_heating%29