"The Vikings discovered and settled Greenland around A.D. 950. Greenland was then so warm that thousands of colonists supported themselves by pasturing cattle on what is now frozen tundra. During this great global warming, Europe built the looming castles and soaring cathedrals that even today stun tourists with their size, beauty and engineering excellence. These colossal buildings required the investment of millions of man-hours – which could be spared from farming because of higher crop yields."
-Dennis Avery, Hudson Institute
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