Problem: Many cleaning products contain harsh chemicals and synthetic fragrances. The National Research Council estimates that less than 30 percent of the petrochemicals available for home use have been tested for their effects on human and environmental health. So you don't always know what chemicals are in cleaning products.

Solution: Use nontoxic, 100 percent biodegradable cleaning products. Avoid extra-strength cleaners, which may contain dangerous solvents, acids, caustic chemicals, bleach and ammonia. Mild, organic cleaners (such as unscented, general-purpose soaps and detergents) and homemade cleaners are also great choices.

The Green Nest Pick: Green Nest All-Purpose Cleaner, $9.95