▁problem ▁for ▁mus icians . ▁ ▁After ▁playing ▁in ▁sm ok y ▁bars , ▁instruments ▁can ▁emit ▁nic ot ine , ▁ 3 - eth en yl py rid ine ▁( 3 - EP ), ▁phen ol , ▁cres ols , ▁nap h th al ene , ▁formal de hy de , ▁and ▁to b acco - specific ▁nit ros am ines ▁( including ▁some ▁not ▁found ▁in ▁fresh ly ▁em itted ▁to b acco ▁smoke ), ▁which ▁can ▁enter ▁mus icians ' ▁bodies ▁through ▁the ▁skin , ▁or ▁be ▁re - em itted ▁as ▁g ases ▁after ▁they ▁have ▁left ▁the ▁sm ok y ▁environment . ▁Conc ern ▁about ▁third - hand ▁smoke ▁on ▁instruments ▁is ▁one ▁of ▁the ▁reasons ▁many ▁mus icians , ▁represented ▁by ▁the ▁New ▁Orleans ▁Mus icians ' ▁C lin ic , ▁supported ▁the ▁sm oking ▁ban ▁there . ▁ ▁Effect s ▁of ▁prison ▁sm oking ▁restrictions ▁Pr isons ▁are ▁increasing ly ▁restrict ing ▁to b acco ▁sm oking . ▁In ▁the ▁United ▁States , ▁ 2 4 ▁states ▁prohib it ▁ind oor ▁sm oking ▁whereas ▁California , ▁Neb r aska , ▁Ark ansas , ▁and ▁Kentucky ▁prohib it ▁sm oking ▁on ▁the ▁entire ▁prison ▁grounds . ▁In ▁July ▁ 2 0 0 4 ▁the ▁Federal ▁Bureau ▁of ▁Pr isons ▁adopted ▁a ▁smoke - free ▁policy ▁for ▁its ▁facilities . ▁A ▁ 1 9 9 3 ▁U . S . ▁Supreme ▁Court ▁r uling ▁acknowled ged ▁that ▁a ▁prisoner ' s ▁expos ure ▁to ▁second - hand ▁smoke