A survey conducted by the Department of Public Health (DPH) shows that one out of every 10 students studying in secondary grade smoke tobacco in one form or another, the Department has said. According to a statement issued by the DPH, the survey conducted among school children last year under the "Global Youth Tobacco Survey' program showed that 5.2 percent of students in the secondary grade smoked cigarettes and 4.5 were habitual smokers. The survey also showed that 6.7 percent of the students who smoked cigarettes had friends who also smoked, DPH said. One third of those who were interviewed in the survey said that they believed that they were being affected by second hand smoke. The World No-Smoking Day is held on May 31st every year and this year's slogan for the event is