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| Acronym | Full form | |
|---|---|---|
| Acronym: PCB | polychlorinated biphenyl | roduced by whales, which may make it harder for them to communicate. Human threats to the potential recovery of blue whale populations also include accumulation of polychlorinated biphenyl (PCB) chemicals within the whale's body. With global warming causing glaciers and permafrost to melt rapidly and allowing a large amount of fresh water to flow into the oceans, there are concerns t |