Nobody knows just how much of a risk toxins in our food really pose. But we're exposed to dozens, if not hundreds, of chemicals, and the effects of some multiple exposures may be more than the sum of their parts.

Forget the smog over LA -- the air indoors is worse than the air outdoors. And far worse when we add paint into the mix.

We tend to think the big, bad world outside is where the unhealthy air is. But for the main source of air pollution in your life you need to look closer to home. In fact, it is your home.

Just 50 years ago, most chemicals found under our sinks existed only in chemistry labs. Today, we consider them essential to modern life.

There are real health hazards to be found in the kitchen. We'll take a look at the top priorities -- from the food you buy, to preparation techniques, to the kitchen products you use.