On May 10, 2007, EHP-in-Press posted an article entitled “Reviewing the Environmental and Human Health Knowledge Base of Carbon Nanotubes.” The authors reviewed the currently available literature about the human health and environmental risk potential of carbon nanotubes (CNT). The authors also investigated the life cycle of the CNT, as release into different environmental compartments may occur at the production stages as well as the product’s usage and disposal stages, which may indirectly or directly cause human exposure. Because, according to the authors, the published literature revealed many open questions, they also systematically interviewed seven leading scientists worldwide and integrated their contemporary knowledge in the review. The authors interviewed scientists who were key authors or project leaders, having investigated and reported the potential impacts of CNT on human health or environment. Through this combined approach, the authors present an updated and contemporary knowledge base for scientific discussion.