Question

what are 'jet streams'?​

Answer 1

Answer:

a narrow variable band of very strong predominantly westerly air currents encircling the globe several miles above the earth. There are typically two or three jet streams in each of the northern and southern hemispheres.

"brief bursts of cold air have been blown into the region by the jet stream"

Explanation:

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Answer 2

Answer:

this is your answer..........