1. 50 million Americans are thought to be addicted to nicotine.

2. Smokers who inhale are likely to become addicted to nicotine.

3. 23 Smokers who inhale are likely to become addicted to nicotine.

4. 24 50 million Americans are thought to be addicted to nicotine.

5. Many smokers who are chemically addicted to nicotine cannot cut down easily.

6. 15 Many smokers who are chemically addicted to nicotine cannot cut down easily.