“…Moreover, another longitudinal study, showed a significant decrease in the prevalence of selfdeclared SHS exposure at workplaces, during leisure time, at home, and public transport after the application of the two Spanish smoking legislations 25 . Other studies, carried out in Spain using questionnaire, showed a decrease in self-declared SHS exposure in all the studied settings after the application of the smoking legislations 16,26,27 . Similar results can be found in Ireland 28 , Scotland 29 , Italy 30 , and USA 31 .…”