Lead • Highly toxic heavy metal which can cause brain, kidney and nervous system damage. • Harmful to young children’s learning abilities and can cause birth defects. Benzene • A carcinogen which causes cancer particularly leukemia. • Affect bone marrow and blood production. Cancer • Men who smoke are 23 times more likely to develop lung cancer than men who do not smoke, while women who smoke are about 13 times more likely. • Smoking is responsible for about 90% of lung cancer deaths in men and 80% in women. • Smoking causes 30% of all cancer related deaths annually.