How Green roofs can increase the health and well-being of urban residents…

Enviroboys has blogged about green roofs before, citing their numerous advantages for urban environments. The main environmental benefits associated with them include minimizing air pollution, reducing the urban heat island effect and improving stormwater management. Noting these benefits, Toronto recently adopted a by-law to require and govern the construction of green roofs on new development in the city. The bylaw is quite comprehensive and rigid leading Toronto in a sustainable direction and demonstrating its commitment to urban greening projects.

A PhD student at U of T is doing research on how urban greening projects like green roofs can increase the health and well-being of employees in the workplace. One major dimension of the PhD student’s research is whether employees in workplaces can actually see green roofs and roof top gardens from their workplace windows. Just being able to see greenery can have important health benefits.

Rachel and Stephen Kaplan have done extensive research on the “role of nature in the context of the workplace”. What has emerged out of this research is the indispensable fact that employers need to invest in programs that are oriented to prevention and enhancing well-being of their employees. In workplace settings, employees experience stress, mental fatigue and occasionally burnout when things get really overwhelming. What becomes fatigued is one’s capacity to focus attention to demands that require effort, thus decreasing their level of productivity… in theory.

Rachel and Stephen Kaplan came up with a theory called attention restoration theory. This theory emerged out of their 1980s book "The experience of nature: A psychological perspective”. This theory asserts that people can concentrate better after spending time in a wilderness, or even looking at scenes of nature. Thus, natural environments have a restorative function for human-beings and we don’t always realize this. In one of their studies of an office environment they reported that “almost 50% of employees thought that the lack of windows affected them or their work adversely”. Job satisfaction and work attitudes were significantly related to the presence of windows for their sample of 123 office workers and health care providers.

In throwing together a nice interdisciplinary analysis of green roofs, we know that they have the potential to improve the health and well-being of urban residents. They have important environmental benefits and from an economic point of view, they can help minimize the energy costs associated with building heating and cooling. The health benefits though, are still nebulously defined, but we can speculate that they do play a role based on the work from the Kaplan’s. Parks and gardens have long been noted for their restorative effects on both mental and physical health. Toronto’s new bylaw can gain way more popularity from developers, residents and hospitals if the health benefits are made clearer.

Finally, if green roofs do corroborate “attention restoration theory” just think about the economic advantages workplaces would accrue. Less stress and mental fatigue among employees can undoubtedly lead to better workplace productivity and job satisfaction. But above all, if green roofs do take off because of their ostensible health benefits, employees would have to have access to them. On breaks and lunches, employees could go to these urban green sites and interact with colleagues.

Key message: Nature can help reduce a person's stress, as well as improve attention. Do green roofs constitute nature? And if so, how do workplace employees perceive them? Interesting how this will play out for Toronto considering its new green roof bylaw.