Lack of exposure to natural light has a significant impact on employees' health. A study conducted in 2013 by Northwestern University in Chicago showed that inadequate natural light could result in eye strain, headaches, and fatigue, as well as interference with the body's circadian rhythms.

At this point, the writer is considering adding the following sentence. "Also, the absence of damage to the concrete foundation and lack of evidence of explosives on site made anarchist activity a more improbable cause of the explosion". Should the writer make this addition here?