Agreed!
what kind of scientist uses their biast opinion instead of facts.
I agree that it is unwise to pass opinion as fact, especially in climate change science.
F'in prove it's not natural, then open your mouth Mr. Steven, till then your just another wannabe Jesus.
One problem is the question : "what is natural?". The assumption (I think) is that the change is happening too fast to be natural. Or, more exactly, the change is faster than previously observed. Obviously, we haven't watched ice shelves for millions of years, but I suppose that there are ice core records
Personally, I don't want the ice to melt - whether it is faster than normal or not - but you could claim that there is a non-human ('natural') cause. The difficulty as always is to find this other cause...