ban banned cigar cigarette disease forbidden health kills lungs nicotine no smoke no smoking prohibit quit risk roadsign sign smoke smokers smoking stop tobacco area cigarettes danger direction environment health risk no smoking in this area sign not allowed pollution prohibition unhealthy warning appropriate behavior appropriate behaviour no smoking sign not permitted penalties permission denied prohibited advisory avenue calle cityscape highway lane object road roads roadway smoke free smoke free facility street street scene streets cease smoking quit smoking anti ash butt butts no stub stubs cease death die kill lung stop tobacco ashtray Dirt isolated trash