Earth has been filled with a lethal gas called "ˈɡɪftɡaːs" which is just "Poison Gas" in German. It originated in Germany from a poison bomb exploding mid-air and it quickly airspread towards other places before they could get rid of it. Now, everyone in the world that's still alive wear gas masks so they don't die. There are workers in hazmat suits trying to help people calm down while clearing the dead people out of each street.

"Move it"

A male worker says before barging past you.