We, the Youth of the Left Republican party of Catalonia (JERC), have attended the 9th Youth Forum of UNESCO, representing the National Youth Council of Catalonia. The conference has been held between the 24th and 28th of October in the city of Paris and has gathered up 500 youngsters from 195 different states under the theme «Young Global Citizens for a Sustainable Planet». At the forum, we have had the chance to debate topics related to climate change and the sustainable development by imagining the world in 25 years. We have eventually reached many conclusions both in a global and local level. Bearing in mind that COP21 and the General Assembly of UNESCO will be celebrated during the next month, we have been able to give our opinion about the future decisions that we want. Furthermore, we have had the opportunity to share ideas and experiences with youngsters from all over the world, exchanging views of the situation in our country and how to improve it.