Read about Africa's two greatest environmental concerns: desertification and the spread of disease. Choose one of these concerns and write a short paragraph about its impact on Africa. What has caused this problem to occur, and how has it impacted people who live there?

Explanation:

Lack of water, and food, being in the vast desert means hard food and little rain this leads to many organisms struggling to live, also being forced to drink dirtier water means you could catch a disease more easily

answer; seasons change because earth tilts on its axis; and the angle of the tilt causes the northern and southern hemisphere to trade places throughout the year;