New figures from the Auckland Ratepayers' Alliance show Auckland Council has invested $3 million on communications and advertising alone for the green waste bins.

This follows the email campaign aimed at mayor Wayne Brown opposing the $36 million spent on the green bins so far.

Auckland Ratepayers' Alliance spokesperson Sam Warren says this doesn't make sense from an economic perspective.

"Auckland Council spends about $36 million a year on the programme - that's a lot. And only a third of Aucklanders actually use it - and even that number seems a little high."

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