The Risks of Smoking People have been smoking tobacco for quite a long time. Some people say smoking goes back to 500 AD. It was brought to Europe by explorers of the 16th century. At the end of the 19th century a machine was made to manufacture cigarettes. This then spread smoking across America. By 1945 it became common for women to smoke. But from the mid 1970’s smoking began to decline in many Western countries. Across the world one third if adults puff their way through five trillion cigarettes a year. Studies show that teenage smoking is on the increase despite government efforts to bring it down. Most smokers began as teenagers. Every year big tobac