This IMD case study examines how companies decarbonize supply chains by addressing scope 3 emissions (indirect emissions along value chains) through partnerships. Featuring ZUCCA, a fictitious food and agriculture company, the case explores partnership strategies with NGOs including World Business Council for Sustainable Development (WBCSD), World Wide Fund for Nature (WWF), and World Economic Forum (WEF). The chief sustainability officer must evaluate which partnership best achieves dramatic scope 3 emission reductions, highlighting challenges of managing emissions outside direct company control and determining optimal sustainability partnership strategies.