That number carries special significance in the international effort to stop dangerous climate change.
Under the 2015 Paris Agreement, nations agreed to try to limit global warming to 1.5 degrees Celsius compared with preindustrial times, or at least to keep it comfortably below 2 degrees Celsius.
The latest temperature data doesn’t mean we’ve already passed that lower limit.
It might be helpful to start with what they aren’t, which is thresholds encoded somewhere in the laws of nature.
Instead, they represent warming levels that would bring consequences that are unacceptably difficult for societies to manage, as decided and agreed upon by the nearly 200 nations that signed the Paris accord.
Locations:
European, Paris