Environmental-economic trends, 1960 to 1990

agricultura agriculture alemania allemagne angebot berechnung consommation alimentaire consumo de alimentos consumo de energia desechos econometric models economic development effluent gazeux energie energy consumption environmental protection food consumption gas residual germany gestion des ressources hogares households modell natural resources production economics protection de l'environnement recursos naturales resource management ressource naturelle tendance tendencias trends waste gases wastes werkstoff