This document summarizes the environmental impact categories assessed in a lifecycle assessment of a medium density fiberboard product. It lists several key impact categories measured, including global warming potential, photochemical ozone creation potential, eutrophication potential, ozone depletion potential, acidification potential, and depletion of abiotic resources. The document also provides a high-level overview of the goals and scope of the lifecycle assessment, including the product definition, functional unit, system boundaries, and standards used.