The Guide was jointly developed by CBD and FAO, with contributions and support from many other institutions and individuals. It is designed as an educational resource for schools, youth groups and other curious young learners. The Guide explains biodiversity in terms of genes, species and ecosystems. It explores biodiversity under the sea, on the 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 impact it, and what we must do to conserve the world's biological resources.