I agree that we might have made some impact on the planet which will have an affect on the balance of climate and the Arctic, but i still struggle to see how we have had a big enough impact to be one of the main causes of global warming or the rapid warming of the Arctic? As said above especially considering we have been on this planet for barely a blink of an eye and been polluting the planet for even less, therefore not really had the the time to affect the planet enough to be much of a cause of the warming we see and increased loss of Arctic sea ice? And has this not happened before with Arctic sea ice loss, before humans were even on this planet? So is it not natural what is happening and will one way or another find another balance? - sorry if i seem ignorant or whatever, i can't say i know a great deal about the Arctic and its systems, which is maybe why i struggle to see how we play much of a role in the losses we have seen in recent times!?