[The focus of Austria's agricultural development in the present time and in the future - the periurban agriculture of Wien]

agricultural development agricultural policies agricultural sector ambiente urbano austria autriche ciudades ecologia ecologie ecology environmental protection environnement urbain exploitation agricole explotaciones agrarias farmland farms land management land use politique agricole protection de l'environnement relaciones campo ciudad relation ville campagne rural areas rural urban relations secteur agricole sector agrario suburban areas terre agricole towns urban areas urban environment urbanisation urbanization utilisation des terres ville zonas periurbanas zonas rurales zonas urbanas zone rurale zone urbaine