People spend about 90% of their time indoors where air quality can be 2-5 times worse than outside. If your home is like most, the indoor air is polluted with dust mites, allergens, formaldehyde, volatile organic chemicals, phthalates, and a large number of other chemicals from the pesticides, cleaners, personal care products, electronics, and furniture you bring into your home. Makes you want to hold your breath, but there are simpler ways to clear the air. Here's a whole alphabet of easy steps.

Avoid pesticides. Find safer solutions at BeyondPesticides.org.

Buy natural personal care products (especially avoiding those with fragrance listed in the ingredients). Visit CosmeticsDatabase.com to find the healthiest options.

Clean without chemicals. Find homemade recipes and safer products at HealthyChild.org.

Dust often. Use a rag moistened with water or a microfiber cloth (especially windowsills and door jambs if your house was built before 1978 and televisions and electronics which can release toxic flame retardants.)

Eliminate wall-to-wall carpeting if at all possible and replace with washable rugs. Carpets are virtual magnets for allergens and other contaminants.

Forgo fragrances and artificial air fresheners. Some just cover odors and others actually numb your nose so you can't smell the offending smell.

Grow plants, which act as natural air purifiers. The most effective ones, based on studies by NASA scientists, include heartleaf philodendron, elephant ear philodendron, English ivy, spider plant, Warneck dracaena, weeping fig, golden pothos, peace lily, Chinese evergreen, and bamboo or reed palm.

Hang dry-cleaned clothes outside or in a well-ventilated area before bringing them inside.

Install a carbon monoxide alarm. Carbon monoxide is an odorless, invisible gas that can cause flu-like symptoms, respiratory problems, and even death. Learn more at www.epa.gov/iaq/co.html.

Just say no to pressed woods and particleboard. These types of wood are often glued together using formaldehyde resins.

Keep your ducts clean. Annually (especially before any season that requires you to keep your home closed up), hire someone to come in and vacuum out your ductwork.

Leave shoes at the door. Lead dust, pesticides, gasoline and more can be tracked inside on the bottom of your shoes.

Maintain a healthy level of humidity. Aim for levels of 30-50%, using a moisture detector (hygrometer). Air that's too humid promotes mold growth. Air that's too dry makes you more susceptible to illness.

Neutralize odors with white vinegar. Put four parts water and one part vinegar in a spray bottle. Use in trash cans, the refrigerator, or other areas with odors. Vinegar will naturally deodorize and within a few minutes, the vinegar smell will dissipate as well.

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