Health aspects Environmental aspects 187 Social aspects 172 Public health 117 History 116 Health and hygiene 114 Toxicology 113 more ... Pollution 109 Medical care 108 Prevention 87 Equality 85 Health risk assessment 83 Veterans 76 Diseases 75 Environmental health 75 Research 71 Physiological effect 69 Safety measures 67 Government policy 61 Health services accessibility 61 Medical policy 61 Air 53 Economic aspects 49 Smoking 49 Climatic changes 48 Health 48 Psychological aspects 46 Persian Gulf War, 1991 45 Risk assessment 45 Nutrition 38 less ...