In 2015 the United Nations announced a radical plan to change the world. Global leaders drew up a list of 17 "sustainable development goals" to create a blueprint for a better future. The goals cover things like gender equality, health provision, a good education and much more. We've asked 17-year-olds from 17 different countries tell us what they think needs to change if the world is to meet those goals by 2030. Seventeen-year-old Hereiti File tells how rising sea levels and ocean pollution are affecting life on the Cook Islands in the Pacific Ocean. She takes a trip out to the coral reef and sees first hand the damage that has been done. But she also meets people who are working hard to reverse some of the damage. Her uncle’s job as a fisherman is threatened by a decline in fish numbers so she asks the Prime Minister of the Cook Islands, Mark Brown, what he’s doing to ensure people have enough food and are prepared for a future where some of their islands are uninhabitable. Presenter: Sana Safi Producer Phoebe Keane Project 17 is produced in partnership with The Open University.