Соответствующая норма
Practice Relating to Rule 45. Causing Serious Damage to the Natural Environment
Section A. Widespread, long-term and severe damage
Under Estonia’s Penal Code (2001), “a person who knowingly affects the environment as a method of warfare, if major damage is thereby caused to the environment”, commits a war crime. 
Estonia, Penal Code, 2001, § 104.