Amiel Ian Valdez was invited to speak on 26 March 2021 before the lawyers and legal staff of the Philippine Department of Environment and Natural Resources (DENR) Legal Affairs Service, and representatives of the DENR Climate Change Division and International Affairs Office. The event is part of the continuing legal education programme of the DENR for its staff.

His presentation focused on the overview and historical developments of International Environmental Law, with particular emphasis on the climate change regime. He also discussed some of the current trends in this field of international law that are particularly relevant to the Philippines, such as those concerning marine environment, illegal wildlife trade, extreme weather events, etc.