Q&A知識翻翻書：泥土是什麼?(3歲以上)Very First Questions and Answers: What is mud?

　　Mud is so much more than squelchy brown stuff. It's why our food grows, why our forests stand tall, why our water and air are less dirty and why billions of living things have somewhere to live. This engaging new title encourages young readers and their grown-ups to delight in mud, to value it in a new way and to help protect the planet's soil for the future.