Gilbert Plass

But some genuinely important things happen during that montage.

In 1956, Canadian physicist Gilbert Plass uses improved calculations to show that adding more carbon dioxide can still cause warming, even though parts of its infrared absorption spectrum are already saturated.

In 1957, Roger Revelle and Hans Suess investigate the oceans and conclude that seawater chemistry sharply limits how quickly the ocean can absorb industrial carbon.

Revelle realizes humanity is conducting what he calls a large-scale geophysical experiment, one we apparently enrolled the entire planet in without obtaining consent.