The key information presented in the two passages is about global warming and its impact in the world.
Both actually include the evidence of the burning of fossil fuels and human activities as the causes of global warming.
It has been presented differently because one uses imagery to describe global warming while the other uses practical example of the polar bears. But both maintaining the key information - global warming.
Global warming refers to the long-term heating up of the climate system of the earth which is as a result of various human activities that are carried out. The primary issue is as a result of the burning of fossil fuel.
The two passages actually talk about global warming and its effect.
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