1) Sub-Saharan Africa is a diverse region made up of over 40 mainland countries and several island nations, with a population of around 688 million people. 2) The region has a variety of landforms, climates, and biomes, from tropical rainforests to savannas and deserts. Major environmental issues include desertification, deforestation, and diseases. 3) Sub-Saharan Africa has a long history of human habitation and societies, and was impacted significantly by European colonialism over the past 500 years, influencing politics, economies, and culture across the region to the present day.