Christine H. Rowley

In the following viewpoint Christine H. Rowley argues that people use tobacco because they are addicted to nicotine. According to Rowley, nicotine is highly addictive and affects the brain in ways similar to cocaine and heroin. She maintains that cigarette smoking is the most efficient delivery system for nicotine and is thus the most prevalent form of nicotine addiction in the United States. However, cigars, pipes, and smokeless tobacco also provide powerful doses of nicotine. Rowley insists that cessation of nicotine use is typically accompanied by withdrawal symptoms, a further indication of the addictive properties of nicotine. Christine H. Rowley is a freelance editor and writer, desktop publisher, and Web page creator.

As you read, consider the following questions:

1. According to the author, when was nicotine first identified?
2. How many smokers...