The Darling River fish kill is what comes from ignoring decades of science | John Quiggin

Culture warriors’ policy amounts to listening to what scientists say we need to do, then doing the opposite

The mass death of fish in Menindee Lakes is a disaster that has been a long time in the making. The story goes back to another disaster on the Darling River, a massive outbreak of blue-green algae that poisoned hundreds of kilometres of the river in 1991 and 1992. The outbreak was a dramatic illustration of decades of warnings from scientists and economists that too much water was being extracted from the river.

The first response was the imposition, in 1995 of a cap on extractions. The cap was meant as an emergency measure to prevent further disasters while a long-term policy was worked out. Nearly 25 years later, it is still in effect. The cap is supposed to be replaced later this year by a system of sustainable diversion limits, worked out on the basis of scientific evidence. But a litany of disastrous policy failures, of which the fish kill is among the more dramatic outcomes, cast doubt on whether this schedule can be met.

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from The Guardian http://bit.ly/2sGpOGm
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