NASA's 1989 study for clean air

Wolverton, B. C., A. Johnson and K. Bounds, Plants for Clean Air Council, Davidsonville, Maryland, 1989
published on Scribd by Avisolo

Remember this infographic? It was based on a study conducted by NASA back in 1989. 

Googling around i found a scan of the original study on Scribd.

So for all of you who are interested in the exact amount of benzene a Golden Pothos plant filters out of the air in two hours and other scientific results: read the report.