BBC: Pollution levels in the River Danube from Hungary’s toxic sludge spill have declined, officials say, calming fears of an ecological disaster. Hungary’s PM Viktor Orban said the situation was "under control". However, concerns remain that toxins from the drying sludge could be spread through the air. The death toll from the disaster rose to five on Friday as one of those injured died in hospital. Three people are still missing. Up to one million cubic metres (35m …