Brussels, 04/06/2009 (Agence Europe) - On the eve of World Environment Day, on 5 June, European Environment Commissioner Stavros Dimas has launched an urgent appeal to the international community to show greater ambition and diligence in on-going negotiations towards a new post-2012 comprehensive climate agreement. What is at stake is immense: a global agreement in Copenhagen “is the world's last chance to prevent the dangerous, perhaps even catastrophic, levels of climate change that are projected by scientists to occur as early as 2050 - well within the lifetimes of over a billion young people alive today,” the Commissioner said.