"I thought: 'why not? I can just apply and see what happens'. I have been hugely passionate with environmental and sustainability issues for as long as I can remember."
It would be eye-opening to be a part of the event, she said.
"Because I am reasonably new to the UN and international relations I am wanting to further understand how countries are able to work together to agree on certain things. It's a tough job to try to get 196 countries to agree on one thing."
This year's topic was urbanisation sustainability.
"I would like to see more education around waste management and reducing household waste. We do already have a good reputation for event-management waste so I want to further that education into homes so families can make their own decisions and be more sustainable."
Ms Rhodes-Carlin will over the next few days set up a Pledgeme page to help raise the $10,000 needed for her trip.
"I will be running a rewards programme so if someone was to donate $100 or $200, I would be able to come and speak to an organisation or group about certain topics such as global responsibility or environmental sustainability."
After her UN trip she tackles a Bachelor of Science at Victoria University in Wellington, and will major in Environmental and Development Studies.