Editors' Summary: The United States is not the only government facing the challenges of nanotechnology regulation. The European Union (EU) is also contemplating a regulatory mechanism for this new technology. Prof. Geert van Calster discusses the EU approach in this Article. He begins with an overview of regulation in the EU, and explains how the growing trend toward coand self-regulation might be applied to nanotechnology. He then describes the impact that the Aarhus Convention may have on regulation, including access to information. The Article concludes with the prediction that the growth of nanotechnology will not lead to radically new regulation mechanisms in the EU.