Climate change: how severe ?
It is worth comparing two annually updated climate models: the UNEP's one (FaiR) and the CAT's one (Magicc7).
In 2005, these 2 estimations are pretty similar :
1/ the stated policies would lead to a 2.6 °C increase in 2100 (50% chance)
2/ the full implementation of NDCs and the different pledges would reduce climate warming by -0.7°C (CAT) / -0.8 °C (UNEP)
Thus, these two estimations converge yet.
Those indicators could give us precious information, but caution is necessary because many states do not meet their NDCs / pledges.
Hundreds of millions of people have been affected by climate warming. Its intensity is unprecedented in history and its effects (heatwaves, droughts, floods, storms, sea level rise, etc.) will increase within the next decades. But to what extent ?
