Randall Munroe does it again

A while back, XKCD shared this excellent comic about climate change, proposing the “Ice Age Unit”, or IAU, defined as 4.5 degrees Celsius, and justified as follows:

Image is headed by the text,

“The good news is that according to the latest IPCC report, if we enact aggressive emissions limits now, we could hold the warming to 2°C. That’s only HALF an ice age unit, which is probably no big deal.”

[Read more…]