What is net zero?

More than 50 countries around the world have pledged to become net zero. But what does net zero actually meanסnd is it achievable? Find The Economistҳ most recent coverage on climate change: https://econ.st/3zCt2uW Sign up to The Economistҳ daily newsletter to keep up to date with our latest stories: https://econ.st/3gJBH8D Why do climate pledges fall [ŝ