Thank you, Donuel. I had forgotten the olympic-size swimming pool as a measure of volume. But also, I think we need something smaller, something in between a breadbox and a pool. How about a freight container, a familiar sight, whether on a truck-tractor or a railroad car?

Whether they are tourists or Icelanders, the visitors are too close. Volcanic eruptions can be unpredictable, the gases they give off can be toxic, and if ash is present, it is bad for the lungs.

I wonder about people who live near erupting volcanoes. Do they have the same life expectancy as other people? Are their lungs as healthy? Good questions.