Answer: South Africa
Notes: A South African university launched a unique anti-poaching campaign by injecting radioactive isotopes into rhino horns. The initiative is called the Rhisotope Project and is led by the University of the Witwatersrand. It is supported by the International Atomic Energy Agency (IAEA). Recently, five rhinos were injected with radioactive isotopes in the Waterberg Biosphere Reserve, South Africa. South Africa has lost more than 10,000 rhinos to poaching in the past decade, making the step urgently needed. Radioisotopes are unstable elements that emit radiation to become stable and can be traced. The isotopes are injected through a non-invasive method and are safe for rhinos.
