This biodiversity guide was designed as an educational resource for schools, youth groups and curious young learners. It explains biodiversity in terms of genes, species and ecosystems, exploring its many shapes and forms under the sea, on land, up in the air, in rivers and lakes, and on the farms that produce our food. The guide considers why biodiversity is important, how humans affect it, and what we must do to conserve the world’s biological resource. At the end of the guide there are inspiring examples of youth-led initiatives and an easy-to-follow action plan readers develop their own projects.