Nature on PBS, still into Global Warming

Watched "Nature" on channel 6, Vermont Public TV.  Interesting show on the Arctic.  Interesting shots of a school of killer whales driving narwhales into the shallows and chowing down on them.  The voice over kept emphasizing that global warming was melting off the Arctic ice cap, allowing the killer whales to hunt farther north.  And it sympathized with the fate of polar bears.  The traditional bear hunting tactic involves walking out on the ice, finding a breathing hole in the ice and waiting for a seal to come up for air.  No more ice, no more seal hunting on the ice.  We did get to see a couple of polar bears going after spawning arctic char, with variable luck. 
    Of course, this year's arctic ice report shows more arctic ice than usual.  That happy talk about the arctic ice going out and  allowing steamships to make it thru the NorthWest passage has died down.
   That didn't seem to affect the Nature voiceover bewailing the onset of global warming.