Sixty years ago, Arctic sea ice was two meters thick, and climate experts predicted that ships would soon be sailing over the North Pole.
The Changing Face of the Arctic; The Changing Face of the Arctic – The New York Times
Sixty years later, the ice is still two meters thick, and both the Northern Sea Route and Northwest Passage are blocked with 10+ foot thick ice.
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Bill Gray always pointed out that climate was controlled by ocean circulation patterns, not greenhouse gases. He was correct, which is why VP Al Gore cut off his funding in 1994.