area cigarettes danger direction environment health health risk no smoking no smoking in this area sign not allowed pollution prohibition sign unhealthy warning ban banned cigar cigarette disease forbidden kills lungs nicotine no smoke prohibit quit risk roadsign smoke smokers smoking stop tobacco appropriate behavior appropriate behaviour no smoking sign not permitted penalties permission denied prohibited cease smoking quit smoking cease death die kill lung stop tobacco butt button buttons image inhale place poison press shape signage signs silhouette smoking-room symbol wood wooden advisory avenue calle cityscape highway lane object road roads roadway smoke free smoke free facility street street scene streets aeroplane air aircraft aircraft cabin ceiling console airplane cabin cabin lights ceiling communicating communication console cooling interior no-smoking sign passenger passengers personal personal air personal light seat-belt sign travel travelers traveling travellers travelling