"A safety filter was a device that helped a user breathe in toxic environments. Many of the Riosan factory workers forced to construct components for the first Death Star worked without proper safety filters, and as a result, many died from the toxic environment."@en . . . "Safety filter"@en . "A safety filter was a device that helped a user breathe in toxic environments. Many of the Riosan factory workers forced to construct components for the first Death Star worked without proper safety filters, and as a result, many died from the toxic environment."@en . . .