I live in Hermosillo, were air conditioning is a must since we usually have temperatures that easily go above 40 degrees Celsius (104 fahrenheit). I've read that air conditioning "takes out" beneficial negative ions from the air. What would be the simplest and economic way for me to add back this negative ions to the air in the house? Could I use sea salt? Would it help?
p.s. Talked to Luis and told me he received some modifications for the book. I'll keep in touch with him to see delivery time.