Growth in Population Density in Africa

• Explain how aridity influences the population pattern that emerges over time?
• Is there a significant spread from key regions of concentration to less populated areas over time? Why or why not? In addressing this question, consider the pressure that high population concentrations exert on agricultural and other environmental resources in areas of high population density. Can this region reasonably support the high recent growth rates of population that you observe between 1970 and 2010?