Contenu
Why should you be a friend to trees?
Trees are a valuable natural resource. People depend on trees for food, and animals depend on trees for food and shelter. But most important, we depend on trees because they add oxygen, a gas we all need, to the air. While trees give us many wonderful products, we must also protect them because we can't live without them.
Informations bibliographiques
janvier 1994, 32 pages, Let's-Read-and-Find-Out Science 2, Anglais
Harper Collins (US)
978-0-06-445120-8