It has been established in Justice League (2001) and Superman: The Animated Series (1996) that Superman cannot survive in space unprotected. Yet during the opening construction sequence, he is seen traveling through space without any sort of protective gear.
During Green Lantern's and Wonder Woman's assault on a drug manufacturing warehouse, after Wonder Woman has been knocked into a wall, Green Lantern backs into view from behind the building with his left arm extended and the sound effects indicate his ring is active. He is not surrounded by the glow indicating such, and his ring is visible on his right hand.