Problem: Your baby's bedding can consist of artificial, petroleum-derived foams and fibers, dangerous flame-retardant chemicals and pesticides, all of which can expose your baby to toxic fumes as they outgas. In addition, stain- and water-resistant treatments add more VOCs to the air we breathe.

Solution: Choose an organic, untreated, natural crib mattress with no chemical flame-retardants. Wool is a good substitute; it's naturally flame-retardant and dust-mite resistant. Avoid permanent-press sheets or draperies, and look for organic fabrics have not been treated with pesticides. If you or your child suffers from allergies or asthma, use barrier covers for pillows and mattresses.

The Green Nest Pick: Natural Rubber Crib Mattress, $398