The negotiators in Paris appear to have agreed to aim to limit warming to “well below” 2ºC, and even “to pursue efforts to limit the temperature increase to 1.5ºC”. But given the most likely value of human-induced warming is over 0.9ºC already and increasing at almost 0.2ºC per decade, (see http://safecarbon.org), is stabilizing at 1.5ºC realistically possible?

Briefing by Myles Allen, Environmental Change Institute, School of Geography and the Environment and Department of Physics, University of Oxford, & Oxford Martin Net Zero Carbon Investment Initiative