In all the 54 countries, the population growth rate is much above the global average, and this is clearly not sustainable in the long term. Name a single country, where the population growth is lower than the global average.
Perhaps you should read more about the elephants. I can help you. Start with these:
http://www.npr.org/templates/story/story.php?storyId=200104722
http://www.theglobeandmail.com/news/world/south-african-province-plans-birth-control-campaign-to-curb-elephant-population/article4482017/
http://news.nationalgeographic.com/news/2004/11/1105_041105_elephants_2.html
http://www.krugerpark.co.za/krugerpark-times-2-2-elephant-overpopulation-19037.html
http://www.sciencedaily.com/videos/4b45d78f90e6ce46d094e5b2d2a083e1.htm