"I've been reading about indoor air pollution, particularly from plastic. I guess you don't even have to touch it or put it in your mouth for it to be dangerous -- it's just the dust that comes off of it. What do I do?!?"
Yes, indoor air pollution is a growing concern, particularly with the prevalence of plastics in our everyday lives. Volatile organic compounds (VOCs) are off gassed from a variety of sources, including fresh paint, new appliances, new carpeting, and many varieties of soft plastics (including some children's toys!).
One of the ways to deal with this is to have indoor plants. A while back, NASA conducted a study to see which common indoor plants are best at filtering pollution out of the air. The recommendation was that the average household should have one plant per 100 square feet (read, one per room).
Many of my friends have pets or babies, so I cross-referenced this list with non-toxic plants as listed on the APSCA website. Here is a short list of plants that are both non-toxic when chewed on and will help make your home non-toxic too!
Safe for dogs, cats, and babies
Bamboo palm (Chamaedorea sefritzii) -- far left
Cast iron plant (aspidistra elatior) -- middle
Gerbera Daisy (Gerbera jamesonii) -- upper right
Spider plant (Chlorophytum comosum) -- lower right
If you do not need to worry about pets or babies, here is a list of plants that I found easy to care for (read: water once a month and otherwise neglect) and easy to find at the local hardware store (I prefer Osh).
Plants that are easy to find and care for
Rubber Plant (Ficus elastica) -- far right
Heartleaf philodendron (Philodendron oxycardium) -- upper middle
Elephant ear philodendron (Philodendron domesticum) -- lower middle
Mother-in-law's tongue (Sansevieria trifasciata 'Laurentii') -- far right
I've also had good luck with the spider plant and cast iron plant listed above. Most of these plants are medium sized and thus relatively inexpensive (exceptions are the rubber plant and bamboo palm, both of which can get very big). Be warned though, nice pots will set you back a bit.