Carbon dioxide stunning

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Carbon dioxide stunning, also known as controlled atmosphere stunning, is a method used in slaughterhouses to render animals unconscious before they are killed. This method is often used for pigs.

In this process, animals are exposed to a high concentration of carbon dioxide ( ${\ce {Co2}}$ ) which causes them to lose consciousness. The use of carbon dioxide is permitted in certain cases despite some opinions on its aversiveness for animals.

See also