The Four Corners - Tipping Point
Scientists now fear that in less than 25 years from now, for the first time in human existence, there will be no sea ice in the North Pole in parts of the summer. These scientists are scrambling to model and measure the pace of the melt and to comprehend the enormity of the consequences – not just for the immediate ecosystem of polar bears and plankton, but for the world's weather and its ability to feed itself.
At the same time governments and corporations scramble to be first at the table for a new resources feast of oil, gas and minerals. It's being dubbed a "Cold Rush" as retreating sea ice opens new opportunities and faster, cheaper shipping routes.
Four Corners journeys to the Arctic Circle to explore how the melt is challenging human understanding of global warming. The Four Corners team joins scientists on board a Canadian icebreaker, Louis S St Laurent, as they scout for icebergs, bears and evidence of a changing seascape. Across the scientific community there is a quest for answers: How fast is the melt happening? Is it stoppable? What may be lost? What riches will be unlocked? How much global warming is caused by people and how much by nature?
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