"This publication constitutes the proceedings of the OECD conference on the "Environmental Uses of Micro-Organisms: An Overview of the State-of-the-Art and Implications for Biotechnology Risk/Safety Assessment". This event, organised under the auspices of OECD's Working Group on the Harmonisation of Regulatory Oversight in Biotechnology (WG-HROB), was held on 26-27 March 2012. ... It was developed in collaborationwith the OECD Co-operative Research Programme under the Trade and Agriculture Directorate. ... There have been many scientific developments in recent years related to the use of micro-organisms in the environment and the conference was an opportunity to provide an overview of the current situation, focusing on concrete or expected developments involving the use of transgenic micro-organisms in the environment."--