ANSWER: Africa
Explanation:
The Bamako Convention on the ban on the Import into Africa and the Control of Transboundary Movement and Management of Hazardous Wastes within Africa is a treaty of African nations prohibiting the import of any hazardous(including radioactive) waste.
The Convention was negotiated by twelve nations of the Organization of African Unity at Bamako, Mali in January, 1991, and came into force in 1998.