The Secretary-General's visit is the first leg of his tour to the Pacific region to see how climate change is impacting the region.
On Wednesday, the New Zealand government submitted to the Parliament the Zero Carbon Bill which outlines the country's plan over the next 30 years on climate change and aims to reduce greenhouse gases to net zero by 2050.
"The UN is the forum where we collectively address the global challenges we face, including climate change and international security," she said.
New Zealand strongly supports the role of the UN in upholding the international rules-based system and ensuring all voices are able to be heard, Ardern added.
Guterres will take part in a climate change and agriculture event in Christchurch on Tuesday as well as pay tribute to the victims of the March 15 terrorist attack which claimed 50 lives.
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