Which is irrevelant sentence?

(A) The Arctic is under threat from the effects of climate change. (B) It also faces threats from oil and gas development, as well as mining and shipping traffic. (C) This has become apparent with the reduction of the sea ice, which has been observed in recent years. (D) Scientists predict much greater warming to take place in the near future. (E) They fear that the region may become totally ice free within a few years.

Is B irrevelant?