Biochemical warfare involves the use of toxic biological agents or chemical substances to harm or kill people, animals, or plants. These agents can include bacteria, viruses, or chemical compounds that disrupt normal biological functions. The goal is to incapacitate or eliminate opponents without the need for traditional weapons. Such warfare is considered a violation of international law, particularly under treaties like the Biological Weapons Convention and the Chemical Weapons Convention. The use of biochemical agents poses significant ethical and humanitarian concerns, as they can cause widespread suffering and long-term environmental damage.