A gas chamber is a method of execution that uses toxic gas to kill individuals. It is designed to be a sealed environment where the gas is introduced, leading to death by asphyxiation or poisoning. This method has been used in various contexts, including during the Holocaust, where it was infamously employed by the Nazis to murder millions of people, including Jews and other targeted groups. Gas chambers have also been used in some states in the United States as a form of capital punishment. The process typically involves the use of chemicals like hydrogen cyanide or carbon monoxide, which are lethal when inhaled. The use of gas chambers has been controversial and raises ethical questions regarding the methods of execution.