When you go back to the early 1990s, just about all of New Zealand's waterways were clean. We had the occasional municipal discharge into our waterways and we had the occasional factory discharge—what we call point-source discharges—that were causing local pollution. But by far the great length of our rivers, and we're blessed with some of the most beautiful rivers, in New Zealand—they were clean. We live in a country that's a steep country, that is a young country, and that has a lot of rain. Therefore, we have great, flushing flows that bring gravels down from our Alps and we have these sparkling rivers that are cleaned every minute of every day by the rejuvenating flows that come from the mountains, and yet, somehow, in the three decades since the early 1990s, we've gone from that position to a point where the majority of the places that we monitor in New Zealand for swimming are not safe to put your head under in summer because the risk of microbial infection puts you beyond safe swimming levels, according to the World Health Organization, and also our turbidity levels have grown to be high. What's—