"The Deutsche Energie-Agentur GmbH (dena) - the German Energy Agency - is the centre of expertise for energy efficiency, renewable energy sources and intelligent energy systems. dena's mission is to gen-erate economic growth and maintain prosperity with ever lower energy inputs. If this is to be achieved, energy must be generated and used in both a national and international context as efficiently, safely and economically as possible with the least possible impact on climate." (Quoted from site)