There is a growing awareness in the business community that the circular economy is not only here to stay, but will continue to gain traction in the coming years, according to new research by GreenBiz and UPS. But the need for a defensible business case is the biggest barrier standing in the way. The report, "The Growth of the Circular Economy," surveyed members of the GreenBiz Intelligence Panel to gain a greater understanding of key aspects and concepts associated with the circular economy and to identify trends that will help define success for this developing system of commerce.