Published in the March 2009 issue of Environmental Science & Technology, this article discusses the difficulties insurance companies are having in assessing the risk to themselves in  insuring manufacturers using nanomaterials in their products, particularly carbon nanotubes, due to a lack of reliable data on the potential effects of nanomaterials on the environment, workers health, and product liability. While some companies have made the decision to exclude nanomaterials from coverage, companies such as Swiss Re and Lloyds of London are recommending that insurers issue  short term coverage as a way of avoiding latent claims . The article is available at