Over the last five years, researchers have calculated that the teenage smoking rates have climbed tremendously. Graph number one shows a steady increase in the number of teenagers who smoke heavily. Graph number two shows how teenage smoking has made a comeback, and how the number of teen-agers smoke occasionally and who develop heavier habits has increased sharply in recent years. The tobacco industry and the critics have very different ideas why this rapid increase …showed first 75 words of 371 total…

…showed last 75 words of 371 total…