The Northwest Passage across the Arctic is currently open to shipping. This is the end of summer so it'll be frozen soon. The fact that this route is possible is claimed as proof of melting ice caps and therefore global warming.
Take a closer look.
The Northwest Passage was impassable in 1978 even with modern icebreaking steel hulls. Now it's open. So that proves global warming, right?
But wait - it was navigated by a Norwegian in a wooden sailing vessel in 1905. No steel hull and no fancy gear. How is that possible?
Then there are the moths. A now-rare species, the flame brocade moth, has appeared in southern England this summer. It's come here from warmer climes in Africa. So, does that prove global warming?
Wait - look at this line.
The large numbers of the flame brocade moth, which used to live in Sussex in the second half of the 19th century...
So in the late 1800s, southern England was warm enough for this moth to be a natural resident but now it struggles to visit. Just a few years later, the 'impassable' Northwest Passage was in fact passed by a wooden sailing ship.
The article on the polar ice tells us what the ice was like thirty years ago compared to now. It does not tell us what it was like a hundred years ago when wooden ships could sail through it and tropical moths lived in England. Afterwards, the moths left England for Africa and the Northwest Passage froze shut. Now we are gradually returning to the conditions seen in the late 1800s/early 1900s and we're not warm enough to compete with them yet.
Yet this is all presented as evidence of global warming caused by modern people, and as a reason to tax us all into the poorhouse.
For some reason I can't quite put my finger on, I am not convinced.