When we fit Europe and North America together we found that the Appalachians and caledonides could form a what kind of mountain

What was the great rift valley formed by

Asap will mark geography final plz ! what are the benefits of international aid? (give me the right evidence )

Which of the following regions suffers the most from acid rain? a. the area around vancouver c. the area below atlanta b. the area below detroit d. the area above montreal