
Scientists have identified a major new threat to the Great Barrier Reef - invisible groundwater flows delivering nutrients at harmful levels.
It's long been known that nutrient-rich river water is a major cause of poor water quality on the reef.

Scientists have identified a major new threat to the Great Barrier Reef - invisible groundwater flows delivering nutrients at harmful levels.
It's long been known that nutrient-rich river water is a major cause of poor water quality on the reef.