Final answer:
Chemical warfare was first utilized during World War I by several countries, including Germany, France, and the United Kingdom. The use of chemical warfare raised significant questions about the ethics and limitations of scientific and technological advancements in warfare.
Step-by-step explanation:
Chemical warfare was first utilized during World War I by several countries, including Germany, France, and the United Kingdom. These countries developed and deployed toxic gases such as chlorine, phosgene, and mustard gas to incapacitate or kill enemy soldiers. The use of chemical warfare raised significant questions about the ethics and limitations of scientific and technological advancements in warfare
This development of chemical warfare also led to a debate surrounding the morality of using such weapons. The international community has since sought to regulate and prohibit the use of chemical weapons through various treaties, such as the Geneva Protocol of 1925 and the Chemical Weapons Convention of 1993.