Mobile Phones Vs. Smoking
From Japan Today:
The number of junior high and high school students who own cell phones is increasing, and there is a high chance that phone bills are weighing on the money they spend on cigarettes.
– Kenji Hayashi, head of the research team of the Health, Labor and Welfare Ministry and an assistant director at the National Institute of Public Health, on the drop in the number of teenage smokers. 
(Via Jean Snow)