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Rule 43 : Application of the General Rules on the Conduct of Hostilities to the Natural Environment
The general principles on the conduct of hostilities apply to the natural environment:
A. No part of the natural environment may be attacked, unless it is a military objective.
B. Destruction of any part of the natural environment is prohibited, unless required by imperative military necessity.
C. Launching an attack against a military objective which may be expected to cause incidental damage to the environment which would be excessive in relation to the concrete and direct military advantage anticipated is prohibited.