It seems to be having a positive impact on pollution, I wonder if similar could be done for other rivers. For those who don't know many New Zealand rivers are t

It seems to be having a positive impact on pollution, I wonder if similar could be done for other rivers. For those who don't know many New Zealand rivers are toxic cesspits thanks to years of intensive dairy farming. It's something that successive governments seem unwilling to act on thanks to lobbying from the dairy industry.