Exigent global environmental threats require concerted global answers and impose great challenges to the international community. Since the 1972 Stockholm UN-Conference, a dynamic and creative development of international environmental law has brought about many important achievements. However, major shortcomings remain to be tackled, and a further globalization of the environmental law with massive impacts on the European and national legal orders is imperative. The European Union can play a leading role in the swift and effective implementation of international law. Today, many EU environmental acts are, in fact, already implementing international stipulations. For an effective future development of international environmental law, a special UN environmental organization appears urgently needed.