9 of the world's most controversial foods

By Tamara Hinson, for CNNUpdated 29th May 2014
Volunteers and professionals work together to save endangered sea turtles. CNN's John Couwels reports.
Pictures are fueling the global outcry over the practice of shark finning. CNN's Brian Todd has more.
China announces plans to ban shark fin soup at official functions, delighting environmentalists. Ramy Inocencio reports.
Princess Sayyida Tania Bint Shabib Al Said is leading efforts to preserve Oman's nature reserves and turtle populations.
This animal might be hunted to extinction before you've even heard of it. We investigate the illegal wildlife trade.
One of only two mammal species to lay eggs, the echidna is being helped by breeding programs in zoos.
One of only two mammal species to lay eggs, the echidna is being helped by breeding programs in zoos.
courtesy judy johnson
Veterinarian Gladys Kalema-Zikusoka is one of Africa's leading scientists working to protect the endangered mountain gorillas in Uganda from human diseases.
Veterinarian Dr. Gladys Kalema-Zikusoka on creating an environment where gorillas and the people who live near them, can coexist safely.
Veterinarian Gladys Kalema-Zikusoka on striking the right balance between conservation and economics.
Director of DolphinProject.org talks to Anderson about efforts to stop Japan's annual dolphin slaughter.
"Dolphins do not carry a Japanese passport, they do not belong to the Japanese people" Ric O'Barry on dolphin slaughters.