Answer:
Radiation levels in the Pacific ocean do not represent a real concern, but plastic pollution yes it is. GMO fish have not been released into the ocean
Step-by-step explanation:
After the nuclear disaster occurred in 2011, concerns about the radiation levels in the Pacific ocean have been raised. However, scientists showed that this nuclear disaster added only one percent more of the naturally occurring radiation existing in this region. In consequence, it does not represent a real problem for human health and fish consumption. On the other hand, plastic debris represents a real problem not only in the Pacific ocean but also in other oceans around the world. However, the Pacific ocean is known to accumulate a major part of the plastic debris, and this ocean is sadly famous to form the largest floating "plastic/garbage" island around the world. Finally, Genetically Modified Organisms (GMOs) are organisms whose DNA has been modified by genetic engineering techniques. GMOs represent a real concern for human health but it is believed that GMO fish have not been released into the Pacific ocean.