• Research Fellow at BehaviourWorks Australia, Monash Sustainable Development Institute, Monash University
Offering free lightweight plastic bags causes excessive plastic use, while banning lightweight bags can increase the use of heavier plastic bags (such as bin liners). Coles’ decision brings out the worst of both worlds. PETER RAE/AAP

Why Coles’ plastic bag backflip leaves us worse off than before

Providing thicker plastic bags for free is worse than pointless. It encourages the same wasteful habits, but with more damaging material.
Single-use plastics are convenient, but it’s time to phase them out. Photo by Sander Wehkamp/Unsplash

How to break up with plastics (using behavioural science)

How do you help a country get over plastic? By creating awareness and minor inconveniences and by providing lots of reminders.

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