Nuclear weapons are in violation of international law. It is prohibited to use weapons or tactics that cause unnecessary and/or aggravated devastation and suffering. It is prohibited to use weapons or tactics that cause indiscriminate harm as between combatants and non-combatant military and civilian personnel. It is prohibited to effect reprisals that are disproportionate to their antecedent provocation or to legitimate military objectives, or that are disrespectful of persons, institutions, and resources otherwise protected by the laws of war. It is prohibited to use weapons or tactics that cause widespread, long-term and severe damage to the natural environment. It is prohibited to use weapons or tactics that violate jurisdiction of non-participating States. It is prohibited to use asphyxiating, poisonous or other gases, and all analogous liquids, materials or devices, including bacteriological methods of warfare.