How did Iceland go from being among the highest the highest in substance use of adolescents in Europe to the lowest in 15 years? Prevention is possible is the name of our sixth Conference held on the 4th to 6th of March 2020 in Reykjavik Iceland. Alongside thorough lectures on the basic methodology of Planet Youth on the first day, the second day will be devoted to our partners around the world working in five continents. They will share their experience on the implementation of Planet Youth, reveal obstacles and opportunities which they have come across in their prevention work. The third day will address practical issues in working with the Planet Youth method.