The troposphere contains 90% of the ozone in the atmosphere. select the best answer from the choices provided
a. true
b. false

Which of the following statements best explains why there tends to be a greater number of large cities in southern africa than the east africa

If we review the changes in the landscape surrounding the great salt lake in utah we can see a change in topography. look at the area to the south of the lake. what change has occurred during the last twenty-nine years? a) erosion of the hills b) an increase in marshland c) flooding of the area and the development of wetlands d) deposition of sediments and an increase in elevation

After world war i, how did the us economy compare to that of germany?