Threats to the Great Barrier Reef

Over the years, we have been told that coral-eating starfish, oil pollution, overfishing, fertilizer runoff, silt, agrichemicals, sewerage, anchor damage, people walking on the reef, ship groundings and global warming were each imminent threats to the reef. Walter Starck, a pioneer in the scientific investigation of coral reefs, looks at the evidence behind these claims and finds that the reality is much different.