How many chemicals and toxic substances do you have in your house? It is a question people rarely ever stop to ask themselves and yet the home and hearth, a safe haven from all that is wrong with the world can harbor some of the most toxic substances. In the wake of the gas leak that awoke city residents to all the dangerous substances that could be in their midst, healthy you tonight examines various toxic substances to be found in the home, and how to keep the risks at a minimum.