This pitch is an opportunity to both discover a year-long work of 11-15 years old pupils on their natural environment and to present an original method to asses young citizens’ perception of nature, based on drawings analysis. Middle school students and scientists will first co-present their studies to raise the audience’s awareness on environmental issues identified by youth. This two-voiced pitch will then open to all participants. They will be invited to discuss questions and local solutions raised by children. As children and professional are two publics that rarely interact on global problematics, the objective of this active participation is for all attendants to listen to each others' concerns and to collectively come up with relevant youth-led actions for nature conservation.