The question seems open to interpretation (which is bad for surveys like this).

If I visit a location that was the site of a mass shooting a few years later, have I been “physically present on the scene of a mass shooting”?

I think you could reasonably answer yes: you’ve been to the physical place where it happened, even if not at the time it happened.

You’re probably not going to save 95% of the trees given the major earthworks likely needed for managing sewage, stormwater, and other utilities. You’ll probably save most of them, though.

40k looks pretty optimistic for the size and number of buildings, too.

I didn’t notice until now that your characters sometimes slightly cover the text boxes! Very cool.