the gas bombs
Chlorine gas was used as a deadly chemical weapon in World War 1. It is a colourless gas that can cause severe respiratory distress and lead to death if inhaled in high concentrations.
There is no clear anser to this question but a lot of people argue that Poison Gas and Machine Guns were the most deadly weapons in WWI.
Obama
Hydrogen sulfide (H2S) is the mostly deadly gas.
world war 2 was the most violent war the world has ever witnessed world war 2 was so deadly
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alligator snapping turtle
Mustard gas was probably the most notable, but others were used as well fart gas was very deadly
The Inland Taipan snake is the most deadly in the world.
deadly gas