These interviews were originally conducted for a module in the Masters in Sustainable Resources: Economics, Policy and Transitions (https://www.ucl.ac.uk/bartlett/sustainable/study/sustainable-resources-economics-policy-and-transitions-msc) at the UCL Institute for Sustainable Resources (UCL ISR: https://www.ucl.ac.uk/bartlett/sustainable/).The module has a slightly out-of-date title (BENV0077: Eco-Innovation and Sustainable Entrepreneurship). It is essentially on the intersection of business, innovation and sustainability. Other course materials cover theories and case studies. The interviews are with people who are putting innovation for sustainability into practice. We wanted to give students the grit under the fingernails of real experience.The interviews were conducted by David Bent, the practitioner co-lead of the module. The academic co-lead is Dr Will McDowall, Associate Professor at the UCL ISR.