No Chewing or Spitting

While at the airport we noticed this sign.  Chewing of betel nuts is very common on the island for both men and women.  The betel nut grows wild on a palm tree.  The nut is chewed with a mixture of lime made from ground clam shells.  The resulting combination products a very red saliva that is constantly spit on streets and sidewalks.  The juice also stains teeth bright red and is a major cause of lip and gum cancer and rotten teeth.  The nuts are sometimes mixed with tobacco to enhance the effects.  It is a habit akin to tobacco chewing and smoking and is very difficult to quit.