Mars (diameter 6790 kilometers) is only slightly more than half the size of Earth (diameter 12750 kilometers).
Answer:
Generating energy that produces no greenhouse gas emissions from fossil fuels and reduces some types of air pollution.
Diversifying energy supply and reducing dependence on imported fuels.
Sub-Saharan Africa's equatorial area is known as Equatorial Africa. There are 13-14 nations, so I'm guessing you want Ethiopia, Rwanda, Kenya, and Somalia, which are the most well-known. Savannas in the north and south, as well as mountains and tropical rain forests, characterize the landscape.