The current spell of cold wave in the US has been a fall out of the : (1) polar vortex (2) biodiversity and habitats (3) climate and energy (4) political administration

The current spell of cold wave in the US has been a fall out of the : (1) polar vortex (2) biodiversity and habitats (3) climate and energy (4) political administration
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(1) polar vortex Explanation: The 2013-14 North American cold wave was caused by southward shifts of the North Polar Vortex. On December 1, 2013, the weakening of the polar vortex led to the beginning of an abnormally cold trend in the Eastern and Central United States.
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The current spell of cold wave in the US has been a fall out of the : (1) polar vortex (2) biodiversity and habitats (3) climate and energy (4) political administration

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