On this episode of Earth Matters we explore the environmental implications of nanotechnology. In what ways could it harm the environment, in what ways could it be used to help the environment, and how should it be regulated.Guests:Louise Sales co-ordinator of Friends of the Earth Emerging Technology ProjectMark Wiesner, PhD, who is a professor of environmental engineering at Duke University in North Carolina in the United States, where he also directs the Centre for the Environmental Implications of NanoTechnology