Himalayan crystal salt lamps are believed to create negatively charged ions in the air. This is a good thing because modern-day pollution and electrical equipment create positive ions in the air which are potentially harmful to us and cause air quality in areas affected to deteriorate. By using a Himalayan crystal salt lamp you replace the negatively charged ions in the air which helps us to avoid the alleged physical and mental harm that the 'electric smog' creates. Other sources of negatively charged ions include waterfalls and the sea, with up to 10, 000 negative ions per cubic meter opposed to just 100 negative ions per cubic meter in the city at rush hour.