For the fourth time in two years, parts of New South Wales are flooding. And once again, people are asking why so many houses were allowed to be built on flood-prone areas.

As Brian Cook and Tim Werner write, developers have strong financial incentives to build on cheaper flood-prone land. Home buyers are drawn to live by the water, and may overlook flood risk in exchange for cheaper housing. And perversely, flood mitigation efforts can make people feel secure when in fact, engineering solutions ward off smaller floods but can do nothing to stop the big ones.

What’s the solution?

A key first step: harden the boundaries of flood-prone areas. If authorities have the appetite, a big step would be to make developers retain liability for floods. That could make many think twice about encroaching on floodplains.

Doug Hendrie

Deputy editor, Environment & Energy

To stop risky developments in floodplains, we have to tackle the profit motive – and our false sense of security

Brian Robert Cook, The University of Melbourne; Tim Werner, The University of Melbourne

People feel more secure knowing there’s a levee nearby - but this can backfire, leading to more development on floodplains. Australia needs to tackle the incentives behind these risky developments.

Australia is heading for its third Omicron wave. Here’s what to expect from BA.4 and BA.5

Adrian Esterman, University of South Australia

BA.4 and BA.5 are more transmissible than previous variants and subvariants, and are better able to evade immunity from vaccines and previous infections. Here’s what we know about them so far.

Sri Lanka scrambles for aid – but Australia still seems preoccupied by boats

Niro Kandasamy, University of Sydney

As authorities desperately seek aid, the Sri Lankan crisis continues.

The ABS’s notion of the average Australian makes little sense. Here’s why

Murray Goot, Macquarie University

The census’s much-discussed “average Australian” has shaky foundations

‘Satanic worship, sodomy and even murder’: how Stranger Things revived the American satanic panic of the 80s

Michael David Barbezat, Australian Catholic University

The latest season of Stranger Things features a town in the grip of a ‘Satanic Panic’. This reflects the very fears that existed in 1980s America, which still exist in different forms today.

How Australia’s gig workers may remain contractors under Labor’s reforms

David Peetz, Griffith University

Uber Australia’s deal with the transport workers union signals the Albanese government won’t mess about with attempts to reclassify gig workers as employees.

Karl Marx: his philosophy explained

Christopher Pollard, Deakin University

Marx’s thought was groundbreaking.His primary interest wasn’t simply capitalism. It was human existence and our potential.

No more excuses: restoring nature is not a silver bullet for global warming, we must cut emissions outright

Kate Dooley, The University of Melbourne; Zebedee Nicholls, The University of Melbourne

New research finds nature restoration only marginally lowers global warming. This pours cold water on the idea of using carbon offsets to solve the climate crisis.

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