It's rubbish that science predicted an ice age in the 70s. The vast majority of peer reviewed studies predicted a rise in global temperatures due to a rise in CO2.
There were a few studies that predicted an incoming ice age, but they were by far the minority. And these studies were based on predictions of the composition of the atmosphere which did not pan out, where the CO2 predictions have been on point.
CO2 atmospheric levels are way below what was predicted because huge amounts of CO2 was absorbed by the oceans. This has wrecked havoc on the oceans, but the point is that the predictions of atmospheric levels were absolutely wrong because they did not account for the ocean absorption effect.
There were a few studies that predicted an incoming ice age, but they were by far the minority. And these studies were based on predictions of the composition of the atmosphere which did not pan out, where the CO2 predictions have been on point.