Dr. Klaus Töpfer, Executive Director, United Nations Environmental Programme (UNEP)
"Sustainable development and principles of environmental protection must be clearly enshrined in the constitutional principles of the EU," says UNEP Executive Director, Dr. Klaus Töpfer.
« Sustainable development and principles of environmental protection must be clearly enshrined in the constitutional principles of the EU, » says UNEP Executive Director, Dr. Klaus Töpfer.
