Air New Zealand wants to tap into more sustainable aviation fuel - to meet net zero emissions by 2050. 

It's aiming to cut well-to-wake jet fuel greenhouse gas emissions by 20-to-25-percent in five years, compared to pre-Covid. 

Air New Zealand's Kiri Hannifin says this is the main way airlines can de-carbonise. 

She says sustainable fuel is costly, but there's ongoing work looking at keeping airfare prices fair - especially for domestic travel. 

"Why it's so expensive at the moment is because there's hardly any available, so the more demand there is, the more supply there'll be available - and that will help get the prices down."

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