diverted for farm irrigation, dams and towns use of its waters, the once-mighty Murray river at present flows into the sea in a trickle. Worse, the river has a high level of pollution by the time it enters the sea near Adelaide, capital of the state of South Australia.

At its source in southeast Australia, the waters of the Murray are crystal clear. But the river in Adelaide carries with it large quantities of agricultural chemicals, salt and other pollutants