AP Environmental Science

Answer: C - Among these choices, the Southern Hemisphere contains the smallest percentage of the world’s population.

Key Takeaway: The Southern Hemisphere is the half of the Earth that is south of the equator. This hemisphere contains all or parts of four continents: Australia, Antarctica, part of South America, and parts of Africa. It also contains most of Oceania. The Southern Hemisphere is significantly less polluted than the Northern Hemisphere due to lower overall population density. Only 10 to 12 percent of the human population resides in the Southern Hemisphere.