#3: Earth at 2° hotter will be horrific. Now here’s what 4° will look like. | Top 10 2019

Third on the Big Think 2019 countdown reveals this is what the world will be like if we do not act on climate change.

  • The third most popular video of 2019 presents a frightening truth: 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.
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