While E coli was the stand-out across three-quarters of all land in Aotearoa, Canterbury needs to reduce nitrogen by 44 percent, and Southland by 41 percent, a new report says.
60 per cent of world's rivers stop flowing for at least one day a year newscientist.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from newscientist.com Daily Mail and Mail on Sunday newspapers.