Imagine a world in which companies could secretly export toxic waste and dump it in unsuspecting communities. Until the 1992 Basel Convention on the Control of Transboundary Movements of Hazardous Wastes and Their Disposal, there were no rules governing the international movement of toxic waste. Today, this convention ensures that such waste cannot be sent to unsuspecting recipients, particularly in the Global South.

What makes this treaty so interesting to me is that it was inspired by an environmental scandal in the late 1980s, when an Italian company dumped toxic waste in the Nigerian town of Koko. The discovery of the waste sparked international outrage and led to stricter global regulations, including the Basel Convention.

Joining me today to explain the impact of the Basel Convention is one of the world's foremost experts on environmental treaties, Maria Ivanova. She is the director of the School of Public Policy and Urban Affairs at Northeastern University and a professor of public policy.

We kick off by discussing how this scandal led to a treaty on the international movement of hazardous waste, followed by a longer conversation about its lasting impact on the world today.

This episode is produced in partnership with Lex International Fund, a philanthropic fund dedicated to strengthening international law to solve global challenges. It is part of a series that demonstrates the impact of treaties on state behavior, which we are calling "When Treaties Work."