The African continent has deserts as well as millions of acres fertile land. As with all ecosystems, deserts change over time. The fossil record shows, for exa

The African continent has deserts as well as millions of acres fertile land. As with all ecosystems, deserts change over time. The fossil record shows, for example, that the Sahara desert once sustained aquatic animals and lush vegetation not present today. It is environmentally prudent to avoid polluting all ecosystems whatever their appearance. Doing so ensures the longevity and continuation of all life on this planet, including that of humans. EDIT: punctuation.