Operation of a planning and general contracting office for all construction tasks in the field of building ecology and building biology; execution of construction work, manufacture and/or distribution of various materials; aims to promote building with natural materials; can participate in other companies, take over representations, make financings for its own or third-party accounts, enter into guarantees and sureties for subsidiaries, acquire, manage and sell properties in Switzerland and abroad, as well as acquire and sell patents and licenses.