Literally out my front door I can see the decline of the glaciers in the Cascades. And I have seen the same for those in the Rockies. We can see the fires in the forests of the Canadian Provinces, the Pacific Northwest, and Alaska. My favorite Wilderness area burned 2/3 rds of its area, and nearly took out three towns. In Washington state, they were dropping retardant on houses in towns, and were just able to save them. In Canada, they were unable to save Fort MacMurray this year. And there are many other fires in Alberta and BC right now.
But Mr. Westwall denies that it has anything to do with the fact that we have vastly increased the GHGs in the atmosphere to a level not seen in millions of years.