In the rush to find new sources of energy and reduce our dependency on fossil fuels, offshore wind farms are increasingly seen as an attractive solution, but their potential impact on marine biodiversity should not be overlooked. Greening blue energy, written in collaboration with E.ON and the Swedish International Development Cooperation Agency, is the most comprehensive guide to date for assessing the impact of offshore wind energy installations on marine ecosystems and biodiversity. It gives governments, policy makers and industry the tools to enhance the environmental performance of offshore renewable energy.