Spider Plant – Chlorophytum comosum

Chlorophytum plant is a commonly found houseplant and is one that is really easy to grow. Within just two days, this plant can remove up to 60 percent of the toxins in your indoor air. The leaves grow quickly and help to absorb harmful substances like mold and other allergens so it is the perfect plant for those who have common dust allergies. It also helps to absorb small traces of formaldehyde and carbon monoxide.

Red-edged dracaena – Dracaena marginata

Dracaena reflexa is a popular ornamental plant, both in the landscape and the home.
D. marginata Lam. – a name found in horticulture – is a synonym of Dracaena reflexa var. angustifolia. The thin leaves are linear and a deep, glossy green color with red edges; typically 30–90 cm long and 2–7 cm broad, tapering to an acuminate point. It is a popular houseplant that needs little attention, with several cultivars available with the leaves variegated with red or pale yellow. It requires a minimum temperature of 15 °C (59 °F), and is more tolerant than most plants of dry soil and irregular watering, though liable to root decay in permanently wet soil. Because it requires minimal care it is very popular in offices where the constant heat and light suits its growing requirements.

It is one of the plants used in the NASA Clean Air Study and has shown to help remove formaldehyde. It is an effective air cleaner and is said to be among the best plants for removing xylene and trichloroethylene.

Sansevieria trifasciata – Snake Plant

Sansevieria trifasciata is an evergreen perennial plant forming dense stands, spreading by way of its creeping rhizome, which is sometimes above ground, sometimes underground. Its stiff leaves grow vertically from a basal rosette. Mature leaves are dark green with light gray-green cross-banding and usually range between 70–90 centimetres (28–35 in) long and 5–6 centimetres (2.0–2.4 in) wide.

Like some other members of its genus, S. trifasciata yields bowstring hemp, a strong plant fiber once used to make bowstrings.

Sansevieria trifasciata is now used predominantly as an ornamental plant, outdoors in warmer climates, and indoors as a houseplant in cooler climates. It is popular as a houseplant because it is tolerant of low light levels and irregular watering; during winter it needs only one watering every couple of months. It will rot easily if overwatered. A study by NASA found that it is one of the best plants for improving indoor air quality by passively absorbing toxins such as nitrogen oxides and formaldehyde.

Peace Lily – Spathiphyllum

The Peace Lily is a beautiful plant and one that can improve your indoor air quality by as much as 60 percent. It helps to reduce the levels of mold spores that grow in the home by absorbing those spores through its leaves and them circulating them to the plant’s roots where they are used as food. In bathrooms, the Peace Lily can help to keep shower tiles and curtains free from mildew and the plant can absorb harmful vapors from alcohol and acetone.

The NASA Clean Air Study has been led by the National Aeronautics and Space Administration (NASA) in association with the Associated Landscape Contractors of America (ALCA). Its results suggest that certain common indoor plants may provide a natural way of removing toxic agents such as benzene, formaldehyde and trichloroethylene from the air, helping neutralize the effects of sick building syndrome.