Соответствующая норма
Practice Relating to Rule 45. Causing Serious Damage to the Natural Environment
Section B. Environmental modification techniques
In 1992, during a debate in the Sixth Committee of the UN General Assembly on the protection of the environment in times of armed conflict, Ukraine qualified the release of large quantities of oil into the sea and the setting alight of numerous well-heads as a “clear illustration of the hostile use of environmental modification techniques in contravention of international law”. 
Ukraine, Statement before the Sixth Committee of the UN General Assembly, UN Doc. A/C.6/47/SR.9, 6 October 1992, p. 8, § 35.