Ahead of COP 26, a rush of businesses declared their commitment to “net zero” emissions targets. But concerns were raised about how credible these targets were. Critics pointed out that many companies’ plans did not require them to change behaviour any time soon, or be held accountable for realising them - and that some of their promises just weren’t good enough. In this edition of The Climate Question, Kate Lamble and Jordan Dunbar ask how much can we believe in companies’ promises on climate?