It goes further back than the 70s.
Climate change was even mentioned in a mainstream movie in 1958. Specifically, “Indiscreet,” a charming romantic comedy starring two of Hollywood’s biggest stars of the time, Cary Grant and Ingrid Bergman.
In this innocuous scene, the two lead characters (Philip and Anna) have recently met and are out on their first date. To break the tense, awkward silence during a painfully long elevator ride, Anna attempts to make casual small talk with Philip.
————
INT. ELEVATOR:
ANNA: It’s unusual for the weather to be so muggy this time of year.
PHILIP: Yes, I read an article the other day that claimed the world’s weather was changing.
ANNA: Really? That’s interesting.
PHILIP: Yes, isn’t it?
———— Yes, Philip, it IS interesting. And you should’ve shared that article with Anna’s brother-in-law, the diplomat! Then we might not all BE in this situation…Philip! 😡
NOT ACCURATE!! Those make sense!