More than 50 countries around the world have pledged to become net zero. But what does net zero actually mean—and is it achievable? Find The Economist’s most recent coverage on climate change: https://econ.st/3zCt2uW Sign up to The Economist’s daily newsletter to keep up to date with our latest stories: https://econ.st/3gJBH8D Why do climate pledges fall short?: https://econ.st/3eVCYaI What are nationally determined contributions to curb climate change?:https://econ.st/3iOi3Yz How sincere are climate pledges?:https://econ.st/3l5yjqy Decarbonising the world’s energy system: https://econ.st/3zQGMT1