Although POPs have been a central concern of ICC and researchers, ICC works towards the elimination of other contaminants and investigates their health effects on the human and natural environments. ICC has lobbied, for example, scientists and others to evaluate the effects of mercury and other heavy metals. ICC has begun a process of working on these concerns with bodies such as the North American Free Trade Agreement (NAFTA) and its North American Regional Action Plan on mercury, lindane, PCBs, and chlordane. Other bodies of importance include the USA Environmental Protection Agency, the UN Environment Programme, the New England Governors / Eastern Canadian Premiers Mercury Working Group, and the Strategic Approach to International Chemical Management (SAICM), to name a few.