Gas! -Or- It Became Necessary to Destroy the World in Order to Save It. (1970) 1970, Comedy, Drama, Sci-Fi, United States Gas! -Or- It Became Necessary to Destroy the World in Order to Save It. (1970) Duration: 1H18M Description: A gas is let loose upon the world that kills anyone over 25 years old… Trailer ↗ United States 1970 Comedy Drama Sci-Fi