How bad will climate change get?

How bad could climate change get?

Humans have already warmed the planet by at least 1 degree Celsius by burning fossil fuels that spew heat-trapping gases into the sky. The oceans are rising, and deadly disasters like wildfires, heat waves, and flooding are becoming more destructive. Almost every part of the world is experiencing the effects of climate change.

That much is “unequivocal,” according to the latest report from the Intergovernmental Panel on Climate Change (IPCC), an international team of scientists convened by the United Nations.

What’s far less certain is just how...