Read about Africa’s two greatest environmental concerns: desertifictation 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?

brave new world, aldous huxley (1932)

explanation:

since the crust is readily accessible, scientists have been able to perform hands-on experiments to determine its composition; studies on the more distant mantle and core have limited opportunities samples. so scientists also rely on analyses of seismic waves and gravity and as well as magnetic studies.