The Wales Institute for Sustainable Education is creating a training and conference facility that aims to demonstrate that "environmentally sound buildings and business practices are possible and comfortable..." Aspects of the project include: low embodied-energy construction materials such as earth and hemp; bio-composite, natural fibre technologies using hemp and lime; energy efficient glazing for maximum natural day lighting and passive heat gain; minimal energy requirements; solar water heating integrated into a district heating system; semi-transparent PV technologies used to provide both energy and shading; biomass combined heat and power linked to the district heating system and grid; biological, zero energy input sewage treatment systems; green transport systems using sustainable fuel sources (from the WISE website)