Endosulfan has been proposed and is currently considered as a candidate for inclusion in the Annex I to the Protocol to the 1979 Convention on Long-Range Transboundary Air Pollution on Persistent Organic Pollutants of the United Nations Economic Commission for Europe ( UNECE LRTAP Convention ) . Endosulfan is recognized as one of the twenty-one high-priority compounds identified by UNEP-GEF ( United Nations Environment Programme - Global Environment Facility ) during the Regional Evaluation of Persistent Toxic Substances ( STP ) , 2002 . These reports have taken into account the magnitude of usage , environmental levels and effects for human beings and for the environment of this compound .