This booklet acquaints the student with current scientific knowledge about smoking and its effects on health, with the economic aspects of smoking, with ways in which young people might help those who now have a smoking problem, and with significant health statistics. It begins, in chapter 1, with a discussion of the history of tobacco and its use. Chapter 2 describes cigarette smoke and its effect on the air. Chapters 3 and 4 concern the lungs and respiratory system, the heart and circulatory system, and the effect that smoking has on them. How smoking causes illness, pain, and death is the topic of chapter 5. The cost of smoking, both financial and physical (such as fires), is discussed in chapter 6, while chapter 7 tells how students can help adults who already smoke. Chapter 8 lists facts that will hopefully discourage the student from smoking. Finally, a glossary of terms is presented. This book is intended for students in grades 4-9, although students in other grades may also find it interesting and useful. A pamphlet containing resource notes for teachers accompanies this booklet. (RC)