What few may realize is that not all organic, green compounds growing in our homes are good for us. In fact, some are not only extremely toxic, but also very difficult to detect. Mold is one of the most common household "intruders", haunting almost every home from modern and air-tight, to dungy and drafty. And because mold grows at room temperature, the house is the perfect environment for mold to thrive in, growing on everything from tile, grout, wood, paint, plaster to fabric.