by David Adams
The Olympic Games in Rio are in full flight and the gold medal rush continues. Much talk in recent days, though, has focused on how the diving pool has turned from a sparkly azure blue colour at the beginning of the Games to something with a peculiarly green and murky tinge. Various explanations have been put forward to explain what has happened, though it is still not entirely clear why.[i] Divers have been assured that the water is safe, and the competition continued, but the event has stirred some deep-rooted fears regarding water quality.
Concerns about water extend beyond the Olympics. In Beijing, for example, the city is experiencing dramatic subsidence because of the extraction of groundwater; [Read more…]