1.

A. Marine life would suffer because a lid of warm water would prevent the circulation that normally brings nutrients to the surface of the sea and the river waters. B. But plant productivity would rise by 50 percent. C. A number of effects are expected from global warming. D. Also, the warmer climate could melt the floating ice of the Arctic Ocean thereby resulting in a 20 ft. rise in oceans and surrounding areas.

A. C D B A
B. B C D A
C. C A B D
D. B A D C
Answer» D. B A D C


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