In fact, the only reason they ever used consensus was because they couldn't prove the theory for certain, as when they can it's clear to everyone as well as the scientists and can be tested directly.
Here are the lists of quotes about the climate from the 70s (which today's believers deny the existence of), agreeing on a quite different phenomenon which, like the one in the 90s soon after, didn't happen.
Bear in mind CO2 was pretty darn high back then as well, and they didn't factor that in as a warming factor.
Get a good grip on your long johns, cold weather haters--the worst may be yet to come. That's the long-long-range weather forecast being given out by "climatologists." the people who study very long-term world weather trends…. Washington Post January 11, 1970
Because of increased dust, cloud cover and water vapor "...the planet will cool, the water vapor... will fall and freeze, and a new Ice Age will be born," Newsweek magazine, January 26, 1970.
"Civilization will end within 15 or 30 years unless immediate action is taken against problems facing mankind. We are in an environmental crisis which threatens the survival of this nation, and of the world as a suitable place of human habitation," - Barry Commoner Washington University Earth Day 1970
"(By 1995) somewhere between 75 and 85 percent of all the species of living animals will be extinct." Sen. Gaylord Nelson, quoting Dr. S. Dillon Ripley, Look magazine, April 1970.
“By the year 2000...the entire world, with the exception of Western Europe, North America and Australia, will be in famine,” Peter Gunter, North Texas State University, The Living Wilderness, Spring 1970.
Convection in the Antarctic Ice Sheet Leading to a Surge of the Ice Sheet and Possibly to a New Ice Age. – Science 1970
“In the next 50 years fine dust that humans discharge into the atmosphere by burning fossil fuel will screen out so much of the sun's rays that the Earth's average temperature could fall by six degrees. Sustained emissions over five to 10 years, could be sufficient to trigger an ice age." – Washington Post - July 9, 1971
"By the year 2000 the United Kingdom will be simply a small group of impoverished islands, inhabited by some 70 million hungry people ... If I were a gambler, I would take even money that England will not exist in the year 2000." Paul Ehrlich 1971
New Ice Age Coming---It's Already Getting Colder. Some midsummer day, perhaps not too far in the future, a hard, killing frost will sweep down on the wheat fields of Saskatchewan, the Dakotas and the Russian steppes…..Los Angles Times Oct 24, 1971