Irene Quaile

Sediment entering the ocean from melting glaciers is changing seawater -- and threatening to disrupt ecosystems on nearby seafloors.

Plastic waste is accumulating in Arctic waters for reasons that are yet to be fully understood, and they add another stressor to an ecosystem already burdened by climate change and acidification.

Investment decisions already made will result new fossil-fuel power plants and significant carbon emissions well into the future.