Globally, most smokers start smoking before the age of 18, with almost a quarter of those beginning before the age of 10. The younger children are when they first try smoking, the more likely they are to become regular tobacco users and the less likely they are to quit.A strong link between advertising and smoking in young people has been proven. The more aware and appreciative young people are of tobacco advertising, the more likely they are to smoke or say they intend to. In response to this threat, World No Tobacco Day campaigns for a total ban on all forms of tobacco advertising, promotion and sponsorship by the tobacco industry.