rio sem fumo is a law enacted by the rio de janeiro state government in 2009 which, aims to protect society from the harmful effects of secondhand smoke, preserving the health of citizens - the law was created in acknowledgement of the statistic that secondhand smoke is the third leading cause of death worldwide.

its enactment was to reduce the opportunities which encourage young people to begin smoking, such as the presence of smoking in closed environments such as bars and nightclubs.

the basic guidelines of the law restrict the smoking of any tobacco products in public or private collective-use environments - the restriction includes cigarettes, cigars, pipes, cigarillos, or any other smoking products derived from tobacco or otherwise.