Building Green for 300% Less?

Building green may be substantially cheaper than most of us think.  "Key players in real estate and construction misjudge the costs and benefits of "green" buildings, creating a major barrier to more energy efficiency in the building sector," according to a study by the World Business Council for Sustainable Development.

The report estimates that the error may be as great as 300%: "Respondents to a 1400 person global survey estimated the additional cost of building green at 17 percent above conventional construction, more than triple the true cost difference of about 5 percent."

If you included the increased productivity of human beings who live and work in green buildings, and the lowered healthcare costs, we wonder if the true savings of building green wouldn't reach quadruple digits?