A massive spike in meth use is being linked to a change in global shopping habits.   

Christopher Luxon has asked ministers to look into meth use, after annual wastewater results show a 96% increase in consumption last year compared to 2023. 

Massey University drug researcher Chris Wilkins told Mike Hosking it's likely a case of both people using more, and more people using.  

He says the increase represents the changes to the drug market, which is moving from a brick-and-mortar store, to a global online platform. 

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