In this second episode of “What If… / Y si…”, we speak with Marcelle Oliveira, the youth climate champion. From early activism to global advocacy, Marcelle shares how young leaders are rewriting the rules of climate action. She explains why youth are not just the future but the present force reshaping policy, mobilizing communities, and demanding justice. Marcelle brings sharp insights on building resilience, scaling local solutions, and the urgency of intergenerational collaboration.