The situation in the Arctic is very worrying. The loss of sea ice is a response to global warming and before we even start to consider the ecological effects there are substantial changes occurring because of the ice loss, including the decrease in the amount of light and heat reflected back into the atmosphere exacerbating the warming effect, the increase in emission of methane from the Arctic shelf seas and the possibility of changes in the jet stream, something pretty much all of us in the northern hemisphere have observed over the last few years. Have we talked about the melting f the Greenland ice sheet? Sea level rise?

It might be too late for the Artic already, I can't see how we can stop that warming happening now and this will prove very problematical in ways we don't even know yet.