Q: What does sustainability mean?
His book Pollution inheritance - New Zealand's Freshwater Crisis recently landed on our desk.
The publisher, BWB Texts, boasts that it publishes "short books on big subjects from great New Zealand writers".
The book claims intensive dairying has degraded our freshwater rivers and lakes and it issues a call to arms to New Zealanders.
We ask, what about the urban wastewater systems daily pumping into waterways?