Key legal question
Whether the federal nuisance claim under Art. 684 CC entitled the plaintiffs to have the trees cut down despite cantonal nature-protection rules.
Extracted holding
No. The cantonal public-law protection regime validly restricted the removal of the protected trees, and this did not conflict with federal civil law.
Extracted reasoning
The trees were subject to Vaud nature-protection legislation. Such public-law restrictions are permissible if federal law is not exhaustive, the rules serve a legitimate public interest, and they do not circumvent or contradict federal civil law. Those conditions were met here.