Organization for Economic Co-operation and Development (OECD) defines cleaner technology
as and that produce durable
products which can be recovered or recycled as far a . United Nations Conference on
Environment and Development (UNCED) (1992), Agenda 21, Chapter 34 introduces the term
environmentally sound technologies ect the environment, are less polluting, use all
resources in a more sustainable manner, recycle more of their wastes and products [4]. Thus Cleaner
Technology and Environmentally Sound Technologies inherently include recovery and recycle as the
sustainable options in the definitions provided above.