The massive problems of famine and plague are well known to us all. A.I.D.S. is by far the largest world-wide epidemic that has been known. It threatens to dramatically reduce world population in the long term.
3). Shida kubwa ya njaa na magonjwa ya kuambukiza yanajulikana vema kwetu sote. UKIMWI kwa ukubwa na maradhi yanayo ambukiza kwa kuenea ulimwengu pote ambao umejulikana.