Which either means we're on Earth, or someone introduced Terran trees to another planet.

[ He peers at them again, head tilted to one side. They're Terran-esque, sure, but-- ]

Correction: mutated Terran trees.

[ Since they're a little different. Maybe he's just talking out of his ass, though, and they're not Terran at all? He shakes himself, peering through the copse of trees before deciding on a direction -- which, incidentally, is the same way almost everyone else is going. ]

This way seems like our best bet.