Related by context. Frequent words. (Click for all words.) 74 secondhand smoke 61 cigarette smoking 59 smoking 58 cigarette smoke 57 smokers 54 asbestos exposure 53 nonsmokers 52 smoking bans 50 carcinogens 50 banning smoking 50 Smoking 49 heart disease 48 air pollution 48 lung cancer 48 sunbeds 48 vitamin D deficiency 48 salt intake 48 smoker 47 harmful effects 47 smoking ban 47 COPD 47 coronary heart 46 binge drinking 46 lung diseases 46 bowel cancer 46 asbestos fibers 45 carcinogen 45 cardiovascular disease 45 carcinogenic 44 acrylamide 44 gum disease 44 smoke 43 diesel exhaust 43 tobacco 43 pre eclampsia 43 cancers 43 HPV 43 disease COPD 43 lung disease 43 obesity 43 SIDS 43 electromagnetic fields 43 chronic bronchitis 43 radon 42 vCJD 42 asbestos 42 asthma 42 indoor tanning 42 trans fats 42 skin cancers 42 Tobacco Control 42 Lung cancer 42 respiratory illnesses 42 dioxins 42 MMR vaccine 42 cervical cancer 41 unborn babies 41 Cervical cancer 41 particulates 41 Health Protection Agency 41 respiratory illness 41 epidemiological studies 41 Health Organisation 41 ultraviolet radiation 41 sudden cardiac death 41 radiation exposure 41 cardiovascular diseases 41 nonsmoking 40 cigarette butts 40 UV radiation 40 DVT 40 Smoke Free 40 physical inactivity 40 obesity epidemic 40 particulate matter 40 Obesity 40 VTE 39 periodontal disease 39 PFOA 39 electromagnetic radiation 39 mesothelioma 39 ionizing radiation 39 tanning beds 39 obese 39 PBDEs 39 binge drinkers 39 STIs 39 lung cancers 39 vitamin D 38 respiratory diseases 38 lung function 38 Chlamydia 38 colorectal cancer 38 meningococcal disease 38 aspartame 38 H. pylori 38 carbon monoxide 38 statins 38 nicotine 38 dietary habits 38 brain tumors