Соответствующая норма
Practice Relating to Rule 45. Causing Serious Damage to the Natural Environment
Section A. Widespread, long-term and severe damage
In its written statement submitted to the ICJ in the Nuclear Weapons case in 1995, Lesotho stated: “Any use of nuclear weapons, even in self-defence, would violate international humanitarian law, including the Hague and Geneva Conventions, which prohibit as practices of war, … causing long-term or severe damage to the environment”. 
Lesotho, Written statement submitted to the ICJ, Nuclear Weapons case, 20 June 1995, p. 2.