berkeman, I read a post of yours stating that "the house next door a wifi cell tower was more dangerous than the one with the antenna on top" Would you please elaborate? Is this because of the umbrella effect? I am considering buying a home which is next door to a house that installed a wifi antenna! The owner indicated this antenna is a transmitter to other wifi antenna in a nearby town and is about 20 meters from the property for sale. The antenna is high up on a rocky area of the back yard and contains about 6 small receivers. He is a radio enthusiast! He also has a smaller wifi antenna or so it looks right next to his home! I am worried about wifi dangers and microwaves exposure. Please let me know how dangerous is to live next door. Thank you.