For years, the fight against climate change has been symbolized by one number: 1.5. Ever since countries agreed in 2015 to an ambition of restricting global warming to 1.5 degrees Celsius above ...

Recent temperature rises have come uncomfortably close to a key benchmark: 1.5 degrees Celsius. It’s a bad sign for the world’s climate goals, but it’s not game over. Not yet. By Raymond Zhong Our ...