Earlier quoted context omitted.
Either build very tall, high density housing to accommodate the population... or reduce the population drastically. A nuclear missile fired into the San Andreas fault, perhaps (this is a movie reference, folks, and not a serious suggestion).
What movie? It sounds vaguely entertaining.
It involves Superman traveling at faster than c to save the day, rather than breaking a promise made under duress, which makes flunking ethical calculus into a super-vulnerability.
Movies based on comic book characters have come a long way. And even movies based on DC characters have advanced slightly.