The United Nations University (UNU) Zero Emissions Forum (ZEF) constructed a wider-ranging concept to expand the one used in Europe and America. It covers reduction of energy and materials consumption, reuse of used products, recycling of materials, use of renewable energy and zero waste from factories. In addition, ZE is designed to create a recycling society, the concept involves not emitting polluting gases or sewage and waste from the community. Ricoh, the world’s largest maker of photocopiers, and many other international companies are now implementing environmental management systems based on the zero-emission concept.