The “dead zone” that has been occurring off the central Oregon coast since 2002 and recently expanding is thought to be caused by which of the following:
W) toxic sulfur gas from undersea vents
X) abnormal upwelling processes due to highly variable winds
Y) an increased presence of invasive predatory species
Z) toxic release of waste products from oil refineries
✔️Answer:X) ABNORMAL UPWELLING PROCESSES DUE TO HIGHLY VARIABLE WINDS
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