Alexander G. Markovsky:
NASA warned of a coming human-caused ice age in 1971
The world “could be as little as 50 or 60 years away from a disastrous new ice age, a leading atmospheric scientist predicts…” — Washington Post, July 9, 1971.
National Academy of Sciences issued report warning of coming ice age in 1975
“A major climatic change would force economic and social adjustments on a worldwide scale, because the global patterns of food production and population that have evolved are implicitly dependent on the climate of the present century.” — Peter Gwynne, “The Cooling World,” Newsweek, April 28, 1975
Science Magazine, July 9, 1971
NASA scientist S. I. Rasool, using a computer program developed by warming gadfly James Hansen, predicted that. “In the next 50 years” — by 2021 — fossil-fuel dust injected by man into the atmosphere “could screen out so much sunlight that the average temperature could drop by six degrees,” resulting in “new glaciers that could eventually cover huge areas…” “If sustained over a period of several years, such a temperature decrease over the whole globe is believed to be sufficient to trigger an ice age.”
The New York Times: Obama’s global warming–promoting science czar John Holdren “warned of a coming ice age” in 1971
In the 1971 essay “Overpopulation and the Potential for Ecocide,” Dr. Holdren and his co-author, the ecologist Paul Ehrlich, warned of a coming ice age.
1970: First Earth Day promoted ice age fears
At the first Earth Day celebration, in 1970, environmentalist Nigel Calder warned, “The threat of a new ice age must now stand alongside nuclear war as a likely source of wholesale death and misery for mankind.”