Key legal question
Whether the cantonal decree on landfill tariff control violates federal supremacy under Art. 49 Cst.
Extracted holding
The decree falls within the cantonal room for action under Art. 31c LPAmb and is compatible with federal law.
Extracted reasoning
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.