At the us open after carding his lowest front nine ever at the first round of a major as records are set at the top of the leaderboard in los angeles. we hear a lot of negative stories about artificial intelligence, but here is one example of its benefits. a pilot project in devon is using al to predict water pollution, including sewage spills. a network of sensors placed in water provides information that, when combined with data about previous spills, should result in early warnings. our environment correspondent jonah fisher went to north devon to find out more. it looks nice from a distanc...