Question

"Dead zones" in US coastal waters have grown 30-fold since 1960, according to a recent government report. This report refers to which of the following environmental pollution issues?
A. eutrophication caused by fertilizer and detergent runoff
B. heavy metal poisoning caused by industrial dumping
C. elevated radiation levels caused by nuclear power generation
D. increased ozone levels caused by climate change

Answer 1

A is the correct answer.

Dead Zones, especially in the Gulf of Mexico, are caused primarily by phosphorous and nitrogen loading from farms in the Midwest that run down rivers and down the Mississippi and into the Gulf of Mexico where they choke out life.