Part 1: They say "what you don't know can't hurt you." While there is some truth to that, being informed allows us to make better choices. From formaldehyde to methyl-mercury to dioxins, there are a wide variety of hazardous chemicals in our furnishings, clothing, cleaning and grooming products, our food, water and air. Kathy Golden speaks with Deirdre Imus, founder of the Deirdre Imus Environmental Center for Pediatric Oncology, a foundation committed to promoting non-toxic alternatives to the more harmful products we may be using everyday. Part 2: Most of us have been exposed to mercury, a poisonous metallic element and neuro-toxin, in several of its various forms, either in the fish we eat or even as an ingredient in a vaccine we received. The mercury preservative in inoculations is thimerosal, and Deirdre Imus advises that parents simply request thimerosal-free vaccines. Then we talk with Nat Mund, Senior Washington Representative for the Sierra Club about the latest relaxations in emission standards for coal burning power plants and the resulting rise in environmental mercury contamination.