Why might a sanction against the use of chemical or biological weapons be part of the Geneva conventions?

Sanctions against the use of chemical or biological weapons are included in the Geneva Conventions to uphold international humanitarian law and protect human rights during armed conflicts. These sanctions reflect a global consensus on the need to prohibit weapons that cause indiscriminate suffering, long-term harm, and environmental destruction. By embedding such prohibitions in the conventions, the international community seeks to prevent atrocities and promote accountability among nations, thereby fostering a more humane conduct of war.