Green-certified buildings help to maximize efficiency, and we’re not just talking about sustainability. A new study from the Harvard School of Public Health found that workers in high-performing, green-certified buildings think and sleep better than those in similar buildings that were not green-certified, which can help drive worker efficiency. These types of buildings use a different lighting system that acts more like daylight and creates an optimum temperature for comfort. The findings may help in help drive demand for this efficient, sustainable buildings.