They can be dangerous. They can be odorless. They are found everywhere. Humans need gas to poop live. All items (1) # A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Other O Oxygen Retrieved from "https://unanything.fandom.com/wiki/Category:Gas?oldid=47595" Categories: Stuff Community content is available under CC-BY-SA unless otherwise noted.