Leading corporate bosses have been rushing to declare their commitment to “net zero” emissions targets. By this, they imply that their companies will dramatically slash net emissions of greenhouse gases to nothing—or even go negative, possibly by making use of technologies for sucking carbon dioxide out of the air and burying it. These promises are in line with commitments made by many governments under the Paris agreement to cut national emissions of greenhouse gases by 2050 to limit global warming. Do you think net Zero is just in writing not actions?