📗 "Hazardous Wastes" explores and investigates two of the main secondary waste producing industries. It gives the reader a detailed insight into the processes (e.g. pyrolysis, pyrometallurgy, smelting, etc) by-products and environmental concerns related to the production of copper and zinc wastes. Further, the author has highlighted the importance of the Basel Convention on the Transfrontier Shipment of Hazardous Wastes in relation to these industries and the importance of dumping of wastes in non-OECD countries. The experimental data presented, as part of a United Nations initiative, supports studies on the effects of various leaching methodologies under simulated environmental scenarios and the relevance of trigger guide levels, as set by the World Health Organisation(WHO), to determine toxicity levels of metals entering soils and waterways, thereby making them bioavailable. The author has captured the need of academia-industry based linkages through research and development, and the book is a complimentary must for all those engaged in enhancing their scientific knowledge to safeguard the environment in countries with less developed technical and regulatory infrastructures.