Many businesses have promised to reduce their greenhouse-gas emissions to net zero, but the promises with the most impact include not just a business's own activities but also those of its entire supply and distribution network. When suppliers lack their own net zero targets, a company faces tough choices: offset those emissions, or look for a new arrangement. As more businesses make these decisions, we're beginning to see the creation of a net zero club. Members of this club are likely to be seen as part of the climate-change solution, while those on the outside risk being viewed as part of the problem. Jason Channell, Head of Sustainable Finance at Citi Global Insights, guides us through these and other topics from his report Sustainable Tipping Points: The ‘net zero club’—when sustainability meets margins & supply chains.