Safe Work Australia, a government agency lacking regulatory authority, has recommended that multi-walled and single-walled carbon nanotubes be classified as hazardous unless they can be shown, on a case-by-case basis with toxicological or other data, to merit a different classification. The agency recently released a report titled “Human Health Hazard Assessment and Classification of Carbon Nanotubes,” which concludes that the recommended classification is supported by the available evidence. Specifically, Safe Work Australia, seeks the classification “Harmful: Danger of serious damage to health by prolonged exposure through inhalation.”