From learning about protecting wild animals and natural habitats to reading about the effects of recycling, books are perfect for showing people how to get involved. Here are four of such books.

Tall Trees

Describing the wildlife that lives in Northern California's redwood forests, it turns story time into a counting lesson as readers count all the creatures in the forests. Readers will also love remembering Tony Frederick's playful poetry about the animals of the forest.

Save the Bees

Bethany Stahl has a whole series of "Save the..." books, and they all have great lessons for readers. The explanations are fun and perfect for animal lovers who want to learn how to make a difference. On her website, she even has links to free books, which are great resources for parents or teachers.

My Friend Earth

The message of this book, written by Patricia MacLachlan, is beautiful and simple, encouraging kids to learn about Earth and all that it does. It has acute die-cut (模切) design, which is fun for little hands to explore, although those under 4 might need some help. It covers a wide range of topics and will help kids gain an appreciation for everything from rain and wind to bears and birds.

Thank You, Earth

The author of this book, April Pulley Sayre, has written many award-winning books, and this one is truly special. It was written in a letter format (格式), thanking Earth for so many great natural moments. You'll find beautiful pictures in this book.