Muddy Waters Life and Death on the Great Barrier Reef
By 2010, forty per cent of the world's coral reefs may be dead. By 2030, half of the Great Barrier Reef may be gone. Parts of it are already dying, but the reasons have not always been clear. Global warming and outbreaks of crown-of-thorns starfish have put extraordinary pressure on the reef. Now scientists have identified another threat - sediments, fertilizers, and pesticides from agricultural run-off.