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Arctic sea ice

Polar Bear Population Faces Sharp Decline as Sea Ice Melts (Video)

Polar Bear Population Faces Sharp Decline as Sea Ice Melts (Video)

Melting Arctic Ice Could Have Major Consequences for Earth (Video)

Melting Arctic Ice Could Have Major Consequences for Earth (Video)

Record-Low Sea Ice Levels in Arctic and Antarctic (Video)

Record-Low Sea Ice Levels in Arctic and Antarctic (Video)