Recreational drug use Behavioral sciences 20.316 Human behavior 20.315 Tobacco use 13.386 Health sciences 13.091 Tobacco smoking 12.910 Biological sciences 11.915 mehr ... Cigarette smoking 10.316 Social sciences 9.636 Applied sciences 8.426 Medical conditions 8.006 Biology 7.636 Alcohol drinking 7.304 Health and wellness 7.284 Population studies 6.468 Agriculture 6.028 Diseases 5.710 Agricultural products 5.487 Physical sciences 5.441 Plant products 5.379 Tobacco products 5.289 Public health 5.195 Cigarettes 5.051 Human populations 4.768 Persons 4.718 Sociology 4.560 Business 4.385 Human societies 4.354 Psychology 4.240 Food science 4.198 weniger ...