As one reads about the history of humans, he/she sees very early on that humans are naturally "tool users." More specifically, humans used tools as a means of subsistence and survival. Even today humans use tools to extend their capabilities beyond imagination. These tools are even used as weapons. However primitive, these early weapons would soon be used against other humans to defend territorial domains, to defend against other warring groups, or for protection against large predator animals. Given the enormous number of weapons used for protection or recreation, one can expect that conventional weapons are harmful to the environment in many ways. Conventional weaponry may be effectively harmful to the enemies, but pollution from these weapons is severely impacting the environment as well. In this article, the authors reflect on the development of weapons and their impact to the environment. They stress the importance of promoting the manufacturing of biodegradable weapons that do not pollute the environment and also strengthening the laws that prohibit the use of toxic and other chemical weapons. (Contains 3 figures and 1 table.)