A recent study found that employees who move from buildings with poor indoor environmental quality to more healthful "green" buildings may reap some benefits, including less absenteeism and higher productivity.

Researchers from Michigan State University did two case studies evaluating the physical and mental health status of people who moved from traditional to green office buildings.

Being absent from work for asthma, allergies, depression and stress decreased following the move into the green buildings; for example, hours absent from work due to asthma and allergies was on average 1.12 per month in conventional buildings and 0.49 in green buildings. The average number of work hours affected by illness per month also declined after the move and worker productivity improved.