Breathing Easier When you breathe, your body takes in oxygen and releases carbon dioxide. During photosynthesis, plants absorb carbon dioxide and release oxygen. This opposite pattern of gas use makes plants and people natural partners. Adding plants to interior spaces can increase oxygen levels. At night, photosynthesis ceases, and plants typically respire like humans, absorbing oxygen and releasing carbon dioxide. A few plants –orchids, succulents and epiphytic bromeliads –do just the opposite, taking in carbon dioxide and releasing oxygen. Place these plants in bedrooms to refresh air during the night. Releasing Water As part of the photosynthetic and respiratory processes, plants release moisture vapor, which increases the humidity of the air around them. Plants release roughly 97% of the water they take in.
Place several plants together, and you can increase the humidity of a room, which helps keeps respiratory distresses at bay. Studies at the Agricultural University of Norway document that using plants in interior spaces decreases the incidence of dry skin, colds, sore throats and dry coughs. Purifying Air Plants remove toxins from air –up to 87% of volatile organic compounds (VOCs) every 24 hours, according to NASA research. VOCs include substances like formaldehyde (present in rugs, vinyl, cigarette smoke and grocery bags), benzene and trichloroethylene (both found in man-made fibers, inks, solvents and paint). Benzene is commonly found in high concentrations in study settings, where books and printed papers abound. Modern climate-controlled, air-tight buildings trap VOCs inside. The NASA research discovered that plants purify that trapped air by pulling contaminants into soil, where root zone microorganisms convert VOCs into food for the plant. Improving Health Adding plants to hospital rooms speeds recovery rates of surgical patients, according to researchers at Kansas State University. Compared to patients in rooms without plants, patients in rooms with plants request less pain medication, have lower heart rates and blood pressure, experience less fatigue and anxiety, and are released from the hospital sooner. The Dutch Product Board for Horticulture commissioned a workplace study that discovered that adding plants to office settings decreases fatigue, colds, headaches, coughs, sore throats and flu- like symptoms. In another study by the AgriculturalUniversity of Norway, sickness rates fell by more than 60 percent in offices with plants. Sharpening Focus A study at The Royal College of Agriculture in Circencester, England, found that students demonstrate 70% greater attentiveness when they're taught in rooms containing plants. In the same study, attendance was also higher for lectures given in classrooms with plants.