Josh Byrne explores a water-cleaning wetland, Jane Edmanson meets a chef who hates waste, Costa Georgiadis sees how plant pots are recycled, and Millie Ross meets a team saving coffee grounds from the tip.

Jane Edmanson meets Lord Howe Island's weed team, Jerry Coleby-Williams shows how to grow bananas, Costa Georgiadis meets a family of camellia growers, and Josh Byrne finds a garden at his local intensive care unit.