The region of the upper atmosphere extending upward from the tropopause to about 30 miles (50 km) above the earth, characterized by little vertical change in temperature.
Answer:
The total area of the United States (including Alaska and Hawaii) is 9.6 million square kilometers (3.8 million square miles).
How big is the sub-Saharan Africa region?
9.4 million square miles
Landforms Ecologically separated from North Africa by the sweeping and sparsely populated Sahara Desert, the sub-Saharan mainland consists of four vast and distinct regions: Central Africa, East Africa, West Africa, and Southern Africa. Together, they constitute an area of 9.4 million square miles.
Colonial powers justified their conquests by asserting that they had a legal and religious obligation to take over the land and culture of indigenous peoples.
At the dedication, the crowd listened for two hours to Everett before Lincoln spoke. Lincoln's address lasted just two or three minutes.
