http://www.nasa.gov/

A recent NASA study shows that  properly chosen indoor
plants significantly improve interior air quality by:
• Filtering air contaminants
• Reducing noxious gases found in most homes and businesses
Plants can drastically improve an interior environment and
significantly reduce problems like:
• Fatigue
• Allergies
• Symptoms misattributed to cold and flu
This results in a healthier home and a healthier workplace. 

Sick Building Syondrome

Environmental Benefits of Live Indoor Plants
Air contaminants cause “sick building syndrome”
which can result in commonly misdiagnosed symptoms such as:
• Sore throats
• Stuffy noses
• Allergies
• Skin and eye irritation
• Nausea
• Respiratory irritation
• Weakness
• Headache
• Fatigue
Indoor air contaminants can result from common sources, such as:
• Furniture
• Carpets
• Insulation
• Cleaning chemicals
• Paints
• Plastics
These symptoms are especially harmful to children and the elderly, and can cause diminished productivity on the workplace.  They are especially prevalent in energy-efficient interiors.