A certification scheme that assesses the sustainability of building products and furniture.To qualify, building materials must be made primarily from renewable virgin resources, mineral resources and secondary resources for which recycling is logistically and energetically feasible. They are made from raw materials which are preferably obtained locally; they derive from a production process which does not involve use of substances hazardous to man or the environment and they do not emit pollutants during use. Materials are supplied with information on sustainability for use by architects and users and come with installation and maintenance specifications for ensuring reduced environmental impact during both construction and use of the building.