Questione giuridica chiave
Whether the administrative appeal was admissible under federal environmental law despite also involving cantonal and municipal rules.
Decisione estratta
The appeal was admissible as an administrative law appeal because the challenged decision was based materially on federal environmental law and the appellants limited their challenge to that point.
Motivazione estratta
The court held that mixed decisions and cantonal rules closely connected to the federal environmental-law issue fall within the administrative law appeal, while purely autonomous cantonal law would not.