Resources
http://wwf.panda.org/what_we_do/endangered_species/elephants/african_elephants/afelephants_threats/
http://www.bloodyivory.org/stop-the-ivory-trade
http://education.nationalgeographic.com/education/media/history-ivory-trade/?ar_a=1
http://www.savetherhino.org/rhino_info/thorny_issues/legalising_the_horn_trade/to_legalise_or_not_to_legalise
http://www.theatlantic.com/business/archive/2012/09/what-is-it-about-an-elephants-tusks-that-make-them-so-valuable/262021/