FTFA: "The authors dug up historical data to show that the cooling in the three decades between 1945 to 1975 – which caused people to worry about the start of

FTFA: "The authors dug up historical data to show that the cooling in the three decades between 1945 to 1975 – which caused people to worry about the start of an Ice Age – was during a cooling phase. (It was thought to have been caused by air pollution.) Earlier records in Central England show the 40- to 70-year cycle goes back centuries, and other records show it has existed for millennia." This is why you can't extrapolate from a cyclical process.