Health aspects Environmental aspects 82 Safety measures 76 Construction industry 32 Pollution 32 Physiological effect 31 Food 30 Toxicology 30 Therapeutic use 28 Nanotechnology 27 Environmental health 26 Nutrition 25 Prevention 24 Electromagnetic fields 23 Exercise 22 Islam 22 Health and hygiene 19 Risk assessment 19 Hazardous substances 18 Health risk assessment 17 Air 16 Smoking 16 Water 16 Diseases 15 Electromagnetism 15 Health 14 Hazardous wastes 13 Travel 13 Functional foods 12 Human engineering 12