What do canaries help in World War 1?

Answer 1

During World War I, canaries were used primarily in the British military as a safety measure in coal mines, particularly for detecting the presence of toxic gas, such as carbon monoxide. Their sensitivity to harmful gases meant that if the canaries showed signs of distress or died, soldiers would know to evacuate the area. This practice helped save lives by providing an early warning system for miners working in dangerous conditions. Canaries thus played a vital role in ensuring the safety of troops involved in mining operations during the war.