To fix pollution on the Great Barrier Reef, some farming practices will have to change.
Land clearing in Queensland has tripled in the past five years.
Too much fertiliser can kill all life in parts of the ocean. It has happened before – and could do so again.
Despite 15 years of concerted action by the Australian and Queensland governments the health of the reef is not improving and in fact may be continuing to deteriorate.
The latest Great Barrier Reef report shows some improvements to water quality over the past five years, but there's still a lot to do on one particular problem: nitrogen.
Built-up urban environments transform the resource of rainwater into wasted runoff. Low Impact Development mimics nature to help get stormwater into the natural water system.