Why should I walk more often? /
MJ Knight.
- Mankato, Minn. : Smart Apple Media, c2009.
- 32 p. : col. ill. ; 27 cm.
- One small step. .
Includes an index
Includes bibliographical references (p. 31) and index.
"Facts about how pollution from cars harms the environment and practical tips for kids about how they can contribute to reducing pollution"--Provided by publisher.