Can Some Green Plants Create a Better Learning Environment?

Many learners have difficulty staying focused. While some of the problems can be attributed to attentional problems, lack of motivation, or irrelevant content, there may be another reasonair impurities. Former NASA scientist B.C. Wolverton, Ph.D., who has studied the effects of plants on indoor environments for more than two decades, suggests that some plants may help improve air quality (1996).

Typically, the left hemisphere, the part of our brain involved in our conscious internal dialogue, is unaware of low to moderate contaminate levels present in many indoor environments. These toxins, however, can trigger chemical reactions in the brain stem which impact breathing and heartbeat. Micro-organisms may generate a stress response while other contaminants can trigger unwanted prior memories or disrupt signaling along the nerve pathways.

In determining the best plants for purifying the air, Dr. Wolverton introduced a scoring system based primarily on the following three criteria: 1) their ability to remove toxic chemical vapors; 2) transpiration rate (ability to evaporate water, hence create greater air movement);  and 3) their ease of care.

Chemicals removed include formaldehyde, acetone, xylene, toluene, benzene, ammonia, and other acetates. These toxins are found in building materials like particle board, plywood, paneling, carpet-backing, adhesives, many fabrics, and garbage bags. Other common irritants include fresh paint, new furniture, and new flooring.

Studies suggest that these chemicals show a correlation to poor concentration, headaches, fatigue, and eye/nose irritations. More controversial claims include the triggering of asthma and other respiratory and neurological problems. Certain high risk groups (with weaker immune systems) are particularly susceptible.

What are the top seven "plant performers?" They are: 1) palms; 2) Dracaena "Janet Craig"; 3) Rubber Plants;  4) English Ivy;  5) Ficus; 6) Boston Ferns; and 7) Spider Plants. How much can these plants contribute to learning? Researchers are currently unable to assign a precise percentage. But everything you can do to improve a learning environment is probably worthwhileespecially when it beautifies in the process.

Wolverton, B.C. 1996. How to Grow Fresh Air. New York: Penguin Books.