Is chemical dependency a serious problem? Teen drug abuse has increased / Biotech Week ; Some teen drug abuse has decreased / Monitoring the Future ; Smoking causes significant health problems / National Cancer Institute ; Smoking-related health problems are exaggerated / Maureen Martin and Joseph L. Bast ; Prescription drug abuse is a serious problem / National Institute on Drug Abuse ; The media have exaggerated the prescription drug abuse crisis / Maia Szalavitz

What causes chemical dependency? Addiction is a brain disease / Michael Craig Miller ; Addiction is a chronic disorder / William L. White and Thomas McClellan ; Addiction is not a disease / Gene M. Heyman, as told to Daniel Akst ; Addiction is caused by genetic and environmental factors / Claudia Wallis

What drug treatment and prevention programs are effective? Needle-exchange programs can reduce the transmission of HIV / Tina Rosenberg ; Needle-exchange programs may not reduce the transmission of HIV / Robert John Araujo ; Methadone is an effective treatment for heroin addiction / Ira J. Marion ; Methadone can be dangerous / JoNel Aleccia ; The cocaine vaccine may be effective / Kayt Sukel ; The cocaine vaccine may not be effective / Rachel Saslow

Should drug laws be changed? The disparity in crack and powder cocaine sentences is necessary / Joseph I. Cassilly ; The disparity in crack and powder cocaine sentences is ineffective and unfair / Bill Piper ; Drug courts are a promising solution to the drug problem / Peggy Fulton Hora ; Drug courts are not a solution to the drug problem / Phillip Smith.