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Norway
Practice Relating to Rule 43. Application of General Principles on the Conduct of Hostilities to the Natural Environment
Norway’s Military Penal Code (1902), as amended in 1981, provides:
Anyone who contravenes or is accessory to the contravention of provisions relating to the protection of persons or property laid down in … the two additional protocols to [the 1949 Geneva] Conventions … is liable to imprisonment. 
Norway, Military Penal Code, 1902, as amended in 1981, § 108(b).
Norway’s Penal Code (1902), as amended in 2008, states:
Any person is liable to punishment for a war crime who in connection with an armed conflict … launches an attack in the knowledge that such attack will cause … damage to the natural environment which would be excessive in relation to the concrete and direct overall military advantage anticipated. 
Norway, Penal Code, 1902, as amended in 2008, § 106(c).