Weapons of mass destruction (WMD) are powerful weapons that can cause significant harm to large numbers of people and damage to the environment. They typically include three main types: nuclear weapons, chemical weapons, and biological weapons. Each type has the potential to inflict mass casualties and destruction over a wide area. WMD are often associated with international security concerns and treaties aimed at preventing their proliferation. Organizations like the United Nations and International Atomic Energy Agency work to monitor and regulate these weapons to promote global safety and stability. The use or threat of WMD can lead to serious geopolitical tensions and conflicts.