post Gas! -Or- It Became Necessary to Destroy the World in Order to Save It. (1970) exists
post Dirty Little Billy (1972) exists
Alex Wilson – MRQE

Dirty Little Billy

Clearly influenced by the darker, more sinister style of spaghetti westerns, Dirty Little Billy offers…

Gas! -Or- It Became Necessary to Destroy the World in Order to Save It.

A gas is let loose upon the world that kills anyone over 25 years old.