Paul Archer Design's proposal for terraced housing in Llanfair Discoed, Wales, is an attempt to develop a prototype for sustainable development in the countryside. The turf-roofed houses are sunk into the landscape to 1.2m, and the removed earth is then used to form a protective berm around the site. The terraces run east-west and are staggered, presenting the main windows to the south and to the sun. All of the houses are timber-framed and super-insulated with recycled newspapers. Photovoltaic cells, heat exchangers and heavy insulation are being developed with Arup.