The 1992 Earth Summit in Rio de Janeiro produced a document called Agenda 21, a blueprint for saving Planet Earth. For the next two years, thousands of children and young people from almost 100 countries worked together in an extraordinary effort to design, write and illustrate a youth version of Agenda 21, called Rescue Mission Planet Earth. Twenty-five years later, we discuss the impacts, legacy and future of the actions undertaken and the key people involved. Rescue Mission editor Danijela Zunec Brandt, Global Optimism’s Marina Mansilla, local school strike organiser, Rosa Lynas and Peace Child International’s David Woollcombe talk to Andy Fryers.