Nordsee One not only produces environmentally friendly energy, but the comprehensive environmental monitoring program during the planning phase, construction and operation has also ensured that impacts from construction and operation of the wind farm has been minimized. During the course of the public permitting process lead by the Bundesamt für Seeschifffahrt und Hydrographie (the BSH), Nordsee One conducted three years of environmental monitoring and also conducted further monitoring during construction as well as ongoing monitoring during operation. Altogether more than seven years of environmental monitoring has been performed providing a comprehensive understanding of the marine environment on and around the site. Where underwater noise has been generated by the wind farm's construction Nordsee One has used the latest state-of the-art noise reduction techniques and has conducted noise measurements to ensure that the noise reduction measures are effective.