I was in Beijing a month ago working on the smoke project in collaboration with an architect there, and I was asked very directly whether it was safe to breathe in the smoke. They did not have confidence in the museum not to use harmful smoke, and they certainly didn't have confidence that the city would protect them from harmful smoke.
I've walked a lot in the mountains in Iceland. And as you come to a new valley, as you come to a new landscape, you have a certain view. If you stand still, the landscape doesn't necessarily tell you how big it is. It doesn't really tell you what you're looking at. The moment you start to move the mountain starts to move.