Ions are molecules that have gained or lost an electron.
Ions are created in nature by sunlight, radiation, and moving air and water that causes electrons to leave hydrogen, nitrogen, and other molecules and attach themselves to oxygen molecules. Molecules with extra electrons from negative ions have a positive effect on the environment. They neutralize odors and contribute to the clean air and fresh smell we find in non-industrial, sparsely populated areas. Research studies have shown the biological activity of small negative ions. There appears to be a connection between ions and mood.