Its final report on PVC which confirms that PVC performs as any other material across all the human health and environmental impact categories of its research. This new report also recognises that giving a credit under the LEED system to avoid the use of PVC is not the correct approach, as it could result in higher health and ecological impacts which would diminish the credibility of LEED. The LEED (Leadership in Energy and Environmental Design) Green Building Rating System is the well known benchmark for the design, construction and operation of high performance green buildings. During the course of early LEED product development a credit was proposed to award the avoidance of PVC (vinyl) in building products, yet it has been asserted that the available science does not support such a credit.