 This statement is crucial, as it mentions clearly for the first time that a worrying climate evolution is ongoing; it is demonstrated and no longer a theoretical projection of the future.He developed his qualities as negotiator at about all Conferences of the Parties (COP) of the United Nations Framework Convention on Climate Change, for over 20 years.At such climate summits the Belgian delegation strongly benefited from the scientific advice and dedication of prof van Ypersele.