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Ancient farmers spared us from glaciers but 

profoundly changed Earth's climate

University of Wisconsin-Madison, September 6, 2018



If You Hate Ice Ages, Thank a Farmer

Chopping down forests and irrigating rice 

paddies boosted greenhouse gases enough 

to prevent the onset of a new ice age

Ronald Bailey|Sep. 10, 2018 2:05 pm



The papers are:


Vavrus, S.J., He, F., Kutzbach, J.E., Ruddiman, W.F. 

and Tzedakis, P.C., 2018. Glacial Inception in 

Marine Isotope Stage 19: An Orbital Analog for a 

Natural Holocene Climate. Scientific reports, 8(1), 

no.10213. (open access paper)




Ruddiman, W.F., 2003. The anthropogenic 

greenhouse era began thousands of years ago. 

Climatic change, 61(3), pp.261-293.






Paul H.

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