Sawmill Brewing in Matakana, north of Auckland, are renowned for their sustainability programme. As New Zealand's only B Corp certified craft brewery they are leading the way for breweries that aim to not only make good beer, but do good things for the environment, and the people who work for them. Co-host Martin Bridges visits owners Kirsty McKay and Mike Sutherland to find out what makes them so successful when it comes to maximising their beer sales while minimising their environmental footprint. Michael and Martin also discuss their award-winning beers and branding as well as looking back at their humble origins.