NASA talks about climate change.

In 1975.

I love wandering around archive.org. Some fabulous but forgotten films in there.

This one, Pollution Below, follows three people and their experiences with pollution and the possible harmful effects, including climate change.

yahoo films synopsis:

Discusses how new NASA technology can reveal new information about pollution and its effects on the atmosphere and oceans.

Approx 14 minutes. (Click the "read more" to see. Had to move it off the front page because of the width and the Halloween theme.)