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 cease cigar cigarette disease forbidden kills lungs nicotine prohibit quit risk roadsign smoke smokers smoking stop tobacco no smoke cease smoking quit smoking appropriate behavior appropriate behaviour care cleaning up after dog directions dog leash dogs evironment garden park no golf no lttering not permitted park usage prohibitions death die kill lung roadsigns signs stop tobacco 3-D advice blue communicating communication conditional conditions eye-catching glassy indication information informative informing insiders limited-access liquidy no-public-access notification notifying plastic raised restriction security semi-transparent staff staff-only words workers black clear transparent