Tiny electric particles flowing in the air around you--negative and positive ions--may increase your sense of well being--or make you feel terrible. Now, here for the first time are the most recent scientific findings about these mood changing "vitamins of the air." How ion therapy can help people wit breathing problems. Why centrally heater or air-conditioned buildings can wear you out. Why parts of California and other mountainous regions around the world are plagued by Witches Winds, frequently causing suicides. Why rainstorms and waterfalls can make you feel refreshed. How ions may change your sex life - and your health.