Questione giuridica chiave
Whether the cantonal decree on landfill tariff control violates federal supremacy under Art. 49 Cst.
Decisione estratta
The decree falls within the cantonal room for action under Art. 31c LPAmb and is compatible with federal law.
Motivazione estratta
Federal law does not create a state monopoly for non-urban waste; it allows cantons to facilitate disposal and to adopt suitable measures, including price control, to avoid monopolies and ensure ecological waste management.