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The article discusses Port Columbus International Airport's use of propane autogas shuttle buses for its clean and green emissions, citing the airport's search for alternative fuels like ultra-low sulfur diesel (ULSD), natural gas and propane to replace its fleet of older diesel-fueled passenger parking shuttles since 2009. While the ULSD did not succeed, the shift to propane autogas provided fuel savings toward bus conversions and maintenance, and increased the airport's return on investment.

The article offers suggestions for spending on research and development (R&D) and product development. Topics discussed include the rate of return on R&D investments and the work of Anne Marie Knott, a professor at Washington University in St. Louis, on it; the methods used to determine R&D spending including lean, flexible and Six Sigma management; and the things that should be taken into account when trying to maximize R&D productivity including capital investment, R&D spending, and labor.