Earth at 2° hotter will be horrific. Now here’s what 4° will look likeThis is what the world will be like if we do not act on climate change. – The best-case scenario of climate change is that world gets just 2°C hotter, which scientists call the “threshold of catastrophe”. – Why is that the good news? Because if humans don’t change course now, the planet is on a trajectory to reach 4°C at the end of this century, which would bring $600 trillion in global climate damages, double the warfare, and a refugee crisis 100x worse than the Syrian exodus. – David Wallace-Wells explains what would happen at an 8°C and even 13°C increase. These predictions are horrifying, but should not scare us into complacency. “It should make us focus on them more intently,” he says.