The best thing about being green is that simple is best.  Choices are (fortunately or not) less plentiful, and certain decisions are a given.  Low VOC paint?  Check.  Carpet?  Nope.  Particleboard furniture?  Uh, uh.  The basic concept from a health standpoint is the toxins in the substances.  Volatile organic compounds as well as the glue used in making pressboard, particleboard and chipboard, and chemicals in carpeting are released into the air over time.  No number of spider plants will eliminate the chemicals forever.  Choosing wood furniture can be a better choice, not only from an environmental perspective, but from a financial one.