The world is the hottest it has been for at least 100,000 years - and not only is the rate of warming higher than at any time in recorded history, that rate is also accelerating. Planet Earth truly is in uncharted territory, says Johan Rockström, director of the PIK Potsdam Institute for Climate Impact Research. Here, he gives the latest take on what the #climate science is saying: how a drop in the planet’s resilience is drawing us ever closer to irreversible tipping points, from the mass colla