Auckland mayoral hopeful John Tamihere says he will deal with the city's rubbish by turning it to energy through "gasification" to avoid it piling up in landfills.
Gasification involves turning waste to energy by pyrolysis, a high-heat process that creates gas and ash.
It has been floated in the past for New Zealand and is used in cities overseas including Los Angeles.
Tamihere said he would seek proposals for a public-private partnership to bring the waste management plan to Auckland.
But his fellow mayoral candidate Craig Lord says Tamihere has stolen the idea from Lord's campaign, which announced the policy months ago.