Arctic Ice Melt, 1950. Image: Rear Admiral Harley D. Nygren, NOAA Corps.

Arctic Ice Melt, 1950. Image: WIkipedia.

Arctic Ice Melt, 1950. Image: Rear Admiral Harley D. Nygren, NOAA Corps.

Arctic Ice Melt, 1950. Image: Rear Admiral Harley D. Nygren, NOAA Corps.

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