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Ocean beneath it. from 1979, nasa satellites have tracked the shrinking of summer ice. it fluctuates from year to year, but the trend is clearly downward. and this year s ice will be the smallest yet. in the recent years we have seen the shrinkage, the minimum is getting smaller and smaller. reporter: so what s caused the rapid warming of the arctic? a recent paper from reading university suggests 30% of it is due to the atlantic oscillation, a natural cycle repeating every 65 to 80 years. it has been in a warm phase since the 1970s. but the same paper calculates that human activity has caused 70% of the warming. pollution from our cars, our homes, and our factories. oil and gas firms are racing to profit from the shrinking ice. the russian giant battled with ....

Summer Ice , Reading University , Atlantic Oscillation , Human Activity , Shrinking Ice , Russian Giant ,