Himalayan salt lamp emits number of negative ions into surrounding atmosphere when it is heated by an external source of electric or candles. The heat produced from the lamp breaks down Na CL Sodium Chloride in a process called ionization. This process is enhanced by the natural process of NACL resulting in the production of negative ions which eliminate the positive ions which are present in our environment, produced by computers, refrigerators, televisions and more. Thus these lamps make the air clean, fresh and healthy to live in. Natural salt crystal is found in ancient evaporated sea beds underneath great mountain masses, such as the Himalayas, where it has been compressed over time to form solid salt rock, with all the minerals structurally intact.