In this third episode of web series Milk & Money, journalist Baz Macdonald looks at synthetic fertiliser and water — key inputs for intensive dairy farming — and asks if there is a way to lessen environmental impacts while still making money. Mark Wynne (from fertiliser company Ballance Agri-Nutrients) and independent consultant Stan Winter offer differing views on fertiliser use, while Greenpeace CEO Russel Norman favours reducing New Zealand's dairy herd to repair environmental damage. Waikato farmers also weigh in. Macdonald writes about the show's birth, and a week spent on a dairy farm.