If you use an automatic sprinkler system, consider installing a weather-based control...

This sturdy, inexpensive substitute for wood is common in homes, though it's often hidden behind an attractive exterior. MDF is a composite material, made from wood fibers and adhesive. It is useful as a substrate material beneath laminate countertops, cabinets, and flooring, among other things. Because synthetic, formaldehyde-based resins are typically used in MDF, this material is a major source of formaldehyde offgassing in homes. Formaldehyde-free MDF products are available.

Bringing your lunch to work or school is environmentally friendly; you're saving money by not...