Climate change threatens the natural balance in Antarctica, which is considered to be a rapid barometer of the global outlook. Scientists can estimate what changes might happen around the world based on what happens in Antarctica. (Video: Assignment Earth)

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"Assignment Earth" features compelling video reports from the front lines of major environmental stories from around the globe. Topics include global warming, pollution, habitat destruction and endangered species.

More videos in the Assignment Earth Antarctica series:

Antarctica research
Antarctica overvisited