Indoor greenery isn't just visually appealing; it offers a plethora of health benefits as well.
Delving into the science behind this phenomenon, Dr. Michael Mosley, host of BBC Science's podcast "Just One Thing," explores the myriad reasons why incorporating greenery into your indoor spaces is conducive to well-being.
From memory and productivity enhancements to improvements in air quality in both homes and workplaces, the advantages are manifold. While most individuals are aware of the detrimental effects of outdoor air pollution, the hazards of indoor air pollution are often overlooked. Yet, indoor air pollution can be just as pernicious, posing various health risks such as asthma, wheezing, conjunctivitis, and eczema. Among the most concerning indoor air pollutants are volatile organic compounds (VOCs), commonly found in flame retardants, aerosol sprays, and cleaning products.
Of particular concern is limonene, a compound prevalent in citrus-scented air fresheners and cleaning agents. Regrettably, limonene reacts with airborne ozone to produce the potentially hazardous chemical formaldehyde. Carbon dioxide, while harmless in well-ventilated areas, can lead to issues such as diminished concentration and impaired decision-making when present in high concentrations.
Fortunately, houseplants offer a natural and effective means of purifying indoor air. While proper ventilation can mitigate these concerns, in cases where ventilation is inadequate, plants serve as invaluable allies in air purification. The assertion that houseplants improve air quality finds its roots in a rather unexpected place – a 1989 study by NASA, which demonstrated that plants could significantly reduce concentrations of VOCs and carbon dioxide within enclosed spaces.
While this study laid the groundwork, subsequent research has delved deeper into the efficacy of greenery in different indoor environments. Notably, a study involving 60 offices with elevated VOC levels found that the introduction of potted plants led to a substantial reduction – between 50% to 75% – in VOC concentrations. Similarly, a Norwegian study examined the impact of placing houseplants in offices, schools, and hospital radiology departments, revealing a marked decrease in instances of coughing, headaches, and fatigue among occupants.
But how exactly do plants contribute to air purification? Dr. Branusa of the Royal Horticultural Society sheds light on this question, explaining that plants utilize several mechanisms to cleanse the air. One such mechanism involves the presence of stomata – small pores located on the underside of leaves – which facilitate the exchange of gases, allowing plants to absorb harmful compounds while releasing water vapor. This process not only removes gaseous pollutants but also increases humidity levels, creating a more comfortable indoor environment.
Plants contribute to air purification through their root systems, where microorganisms break down pollutants present in the soil. This synergistic relationship between plants and soil microorganisms serves as an additional means of reducing indoor air pollution.
The incorporation of indoor greenery offers a host of benefits beyond aesthetic appeal. From purifying indoor air to enhancing overall well-being, houseplants play a vital role in creating healthier and more livable indoor environments. As research continues to elucidate the mechanisms underlying these benefits, the case for embracing greenery within indoor spaces grows stronger, underscoring the importance of integrating nature into our everyday lives.
