The Major Chemical
Weapons and Their Effects
The nation or organization that uses disease-causing organisms as weapons is probably also prepared to use chemicals if they are available. Chemical weapons are less difficult to develop because one does not have the problem of keeping an organism alive. Developing effective biological weapons requires some knowledge of microbiology, but chemical weapons can be produced by anyone with a basic knowledge of chemistry. Chemical weapons are effective as instruments of terror, but unlike biological weapons, they do not hurt or kill anyone who was not originally exposed.
Like biological weapons, chemical weapons may be chosen because they kill humans, animals, and plants cheaply, silently, and without destroying buildings or property. The cost of killing people with chemical weapons has been estimated at about $600 per square kilometer (.62 miles) compared to $2,000 per square kilometer using conventional weapons.