"Indoor ozone", as it is formally called, is created by, "copy machines, laser printers, ultraviolet lights, and some electrostatic air purification systems, all of which contribute to increased indoor ozone levels," states Science Daily.
NASA and the Associated Landscape Contractors of America did studies on using plants to filter the air in space stations in the 1980s, and found that certain ones are great for getting rid of VOCs indoors. The Journal of American Society of Horticultural Science has also published numerous studies on the effects of plants on indoor air pollution, showing direct correlations between the plants' effects on air quality and respiratory health.
The Mother Nature Network has made this handy list (with photos) of the 15 house plants that improve indoor air quality. For instance, did you know that the pretty and colorful gerbera daisies remove the chemicals trichloroethylene and benzene from the air?
Not only will you breathe easier with these plants around, you'll also be adding some nice flora accents to your decor. See the list here at MNN.com.
Information via MNN; image via 718nairanaira.blog.com.