Many cities in Africa, Asia, and Latin America face serious problems managing their wastes. Two of the major problems are the insufficient collection and inappropriate final disposal of wastes. Despite spending increasing resources, many cities - particularly in Africa and Asia - collect less...

China has undergone remarkable economic growth spearheaded by industrialization. Chinese industry demands a wide variety of raw materials in increasing amounts in order to manufacture all kinds of products. Industrial demand exceeds domestic supply for several materials. Thus, China needs to...