he remains an active member of ipcc and contributes strongly to the development and dissemination of its scientific message. he established the walloon platform for the ipcc, with the assistance of the walloon government in belgium to facilitate contacts between the ipcc, the scientific world and politicians. he was appointed by unesco to be part of a group of experts tasked with drafting a declaration on ethical principles in relation to climate change (approved by the unesco assembly in november 2017). the un secretary general appointed him in 2016 as a member of a 15-member group of scientists tasked with the preparation of the first quadrennial global sustainable development report. in 2017, he was appointed as a member of the high-level advisory group for the cop23 presidency by the fiji prime minister.