Young People and Smoking 207,000 children start smoking in the UK every year. Read the facts on young people and smoking. What’s in a Cigarette? Did you know there are over 4000 chemicals in cigarettes? Cost of Smoking Smoking isn’t only costly to your health Big Tobacco Tactics Big Tobacco companies use different tactics to influence young people to start smoking. Smoking in Pregnancy Smoking during pregnancy can lead to miscarriage, stillbirths and affect development. British American Tobacco British American Tobacco, BAT, is the second largest tobacco company in the world.