Melancholy, please choose green

Could houseplants you into the ideal employee? Scientists will demonstrate how the plants in the office could be the key to reducing stress and its related health problems at work. Study results indicate that indoor plants not only improve air quality, but can boost productivity and reduce the amount of sick leave taken by staff.

When Professor Virginia Lohr of Washington State University, has asked two groups of students, both working in windowless offices, to complete tests on computer, she found that the reaction time was 12 percent faster and stress levels much lower among those with plants on their desks.

Similar results were recorded by Helen Russell, an environmental scientist at the University of Surrey, who asked subjects to perform mental arithmetic exercises while being distracted by irritating noises, as it measured changes their heart rate and blood pressure. Again, when plants were introduced, the stress indicators were much lower. Both researchers agree that the air purifying action of plants has helped create a more relaxed, in the study of Russell, the plants eventually led to a drop of 60 percent of absenteeism from work.

Place the plants in poorly ventilated areas has long been known to improve air quality and humidity. But it is now thought that the ability of plants to reduce levels of volatile organic compounds emitted by synthetic materials used in products such as paints, carpets, furniture and the glue has a direct influence on stress and health work.

The office provides on average a cocktail of airborne chemical compounds from dry cleaners, shampoos, soaps and deodorants adding to the VOC. "Almost everyone wears them on VOCs," says Dr. Ronald Wood, University of Technology Sydney. 'When the chemical emissions are multiplied by the number of people in all places, the risk exposure is phenomenal. VOCs are considered a major cause of headaches, stress, lethargy, sore eyes and respiratory problems. Plants metabolize pollutants and have literally cleaned the air we breathe. "

Other studies have shown impressive results. Professor Tove Fjeld of the University of Agriculture, Oslo, Norway asked students and office workers about their working conditions and state of mind.

He found that the presence of house plants have increased the concentration levels of 33 percent, reduce headaches by 45 percent and resulted in 31 percent fewer complaints about dry throat and cough. Nearly 33 percent of people were less tired, and colds and runny nose fell 11 percent.

"Plant roots break down chemicals that have been absorbed by soil or leave and turn them into plant food. We found that lowered VOC third "Fjeld said.’A similar process using plants to control moisture and helps prevent coughing and sore throat."

"In companies in America and Australia a lot, convinced by the search for Wood, insist on the installation of plants to improve indoor air." A loss of 1 percent of the productivity of employees who are dissatisfied with working conditions equivalent to almost four times the average cost of heating or air conditioning throughout the building.

This could be avoided with the use of plants, he said.

"Investing in more plants is one of the most profitable ways to raise the morale."

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