How was the gas mask invented?

How was the gas mask invented?

      During World War I, the German army and the Anglo French coalition faced off in the Ibor region of Belgium for a long time. In 1915, the German army used chemical weapons to release 180 tons of chlorine gas into the Anglo French coalition positions, resulting in 50000 Anglo French soldiers being poisoned and killed. A large number of wild animals near the battlefield were also poisoned and killed, but surprisingly, the wild boars in this area survived. After careful research by scientists, it was found that wild boars have a habit of using their mouths to dig the ground, which saved them from danger. When wild boars smell strong and irritating odors, they will use their mouths to dig the ground. When the soil is moved by wild boars, the soil particles become softer, thus filtering and adsorbing toxic gases.

      Based on this discovery, scientists from the British and French coalition quickly designed and manufactured gas masks using activated carbon with strong adsorption capacity, which had better effects. Although the adsorbent performance used in wholesale gas masks is getting better and better, the basic style of gas masks resembling pig mouths has not changed.