2. The narrow, flat, semi-arid plain located between the Sahara and the southern savannas is
the

How are farmers that use no plow farming methods able to improve air quality for the people around the fram

Ateam of researchers calculates that a glacier will melt completely away in the next 100 years. which land structure will most likely be left behind after the glacier melts?

Who developed the theory of plate tectonics?