Most people live where water is available.  The most populated areas are along the Nile, Niger, Congo and Senegal rivers etc. With the highest birth rate of any continent, Africa is projected to grow to two billion by 2050. Women in sub-Saharan Africa bear an average of 6 children each. Life expectancy is low (Sierra Leone: 34 years, Zambia: 37 years, other countries: 40–49 years) compared to the developed countries. Since the 1960s most countries have seen improvements in life expectancy, health care, and education. However, still many more positive things are to be done here and can be done here. The world or the Church cannot be a mere spectator to what is happening here.