Editing Arctic (section)

=== Pollution ===
{{main|Pollution in the Arctic Ocean|Arctic haze}}
[[File:contamination pathways large.jpg|thumb|upright=1.7|Long-range pollution pathways to the Arctic]]
The Arctic is comparatively clean, although there are certain ecologically difficult [[Pollution in the Arctic Ocean|localized pollution]] problems that present a serious threat to people's health living around these pollution sources. Due to the prevailing worldwide sea and air currents, the Arctic area is the fallout region for long-range transport [[pollutant]]s, and in some places, the concentrations exceed the levels of densely populated urban areas. An example of this is the phenomenon of [[Arctic haze]], which is commonly blamed on long-range pollutants. Another example is with the [[bioaccumulation]] of PCBs ([[polychlorinated biphenyl]]s) in Arctic wildlife and people.