Indeed, we're missing some data. Certainly I'm pretty appreciative of the Tidy Kiwi campaign, and how NZ seems to have embraced that. On a personal scale I think NZ is great about conservation and cleanliness, perhaps better than anywhere I've been. But it feels like conservation is somewhat missing from the national dialogue. And, thinking a little more about it, time might be an important factor here. I've been living outside NZ for a little over four years, and during that time clean rivers has become a central political issue. So perhaps I'm plain wrong now!