The Kaikorai Valley College 16-year-old will be in the temperate Brazilian city on June 10-12 to represent New Zealand at the Global Sustainability Conference Rio+20.
She will be among four youth delegates selected from New Zealand secondary schools to attend the conference, where they will contribute a distinctly New Zealand perspective on sustainability issues such as climate change.
The aim of the conference is for delegates from around the world to present ideas and solutions they have developed and implemented in their own schools and communities.
Enviro Challenge New Zealand Charitable Trust chairman Calum Revfem said the annual event would enable young New Zealanders to become world-class sustainability leaders.
"The Rio+20 conference presents a unique opportunity for our young people to participate, contribute, learn and develop to lead sustainability initiatives in their schools and communities."
Mr Revfem said the youth ambassadors were trained and selected through their active involvement in the Enviro Challenge secondary school sustainability programme and the Sir Peter Blake Youth EnviroLeaders Forum, which was run in conjunction with the Ministry for the Environment earlier this year.
"The delegates are actively engaged in a range of other local and national sustainability programmes."
Injy said it was an "amazing" opportunity.
"It may be sunny outside, but all I'll be interested in, is what is happening inside the conference room. I really want to express what the New Zealand youth want for their future, in terms of the environment and its sustainability."
Injy would raise issues such as lignite mining and its effect on the Otago and Southland communities, and sustainable electricity generation such as wind farms.
As part of the trip, she was also looking forward to visiting the Amazon rainforests to see for herself the effects of deforestation.
On top of her school work and fundraising for the trip, Injy continues to work hard for her school in the Enviroschools group, and will hold a "No Power" day at Kaikorai Valley College later this year.
The day will be aimed at conserving electricity and highlighting how much pupils and staff at school take electricity for granted.
She said life would be interesting for the day, because there would be no lights, no heating and no computers.
