The breaking of the surface tension of water, by waves, falls or evaporation releases negative hydrogen ions in the atmosphere. By their ability to stick to different free radicals, they are very beneficial for our health. Negative ions of Hydrogen are more concentrated in fresh air. They can be produced by lightning, ocean surf and waterfalls or plants. Natural negative ions can have many health benefits, like:
enhance the immune system
increase alertness
increase work productivity and concentration
reduce susceptibility to colds and flu
relief from sinus, migraine headaches, allergies and hay fever