The average person spends 90% of their time indoors. Worse, recently the EPA put into the Congressional Record the fact that indoor air is more polluted than outdoor air. Americans are literally giving themselves and their children lifelong allergies with our disgusting indoor air. Every time you walk into your house, you bring lots of pollutants in with you--pollens, chemicals, soil, tar, dirt, car exhaust, cigarette smoke, and thousands of other things. Then you shut the door, and these pollutants have nowhere to go except where gravity takes them--into your carpet! How bad are these pollutants? Well, for example, the day after you spray for bugs, the concentration of insecticide is 10 times stronger in your carpet than it is outside where you put the poison. Can you imagine your child or grandchild crawling across a carpet that has 10 times the insecticide needed to kill bugs, putting their hands in their eyes and mouths?