If you think houseplants aren’t worth the trouble, think again. In his book, How to Grow Fresh Air, Dr. BC Wolverton, an environmental consultant and retired NASA scientist, describes how houseplants filter toxins from the air inside your house or office. Plants become the lungs of a building, much like the tropical rainforests are the lungs of the Earth. Learn how houseplants improve the overall quality of your life. Subscribe to my podcast feed (so you can open the attachment below). If you can't wait, listen to the mp3 audio file by clicking here.