Primate Extinction: 'We could lose the lungs of the earth'

Scientists are warning that almost two-thirds of primates, from gorillas to lemurs, are threatened with extinction and three-quarters are suffering declines in numbers.

Anna Nekaris, a professor in Primate Conservation at Oxford Brookes University, tells Today that losing species will have serious consequences for the rainforest and human medicine. She also says zoos are not the answer.