This book offers a new paradigm shift in wastewater is a future of afforestation in the world and it's Effect on growth, soil properties and heavy metals accumulation by African mahogany. This study was investigated the effects of irrigation with wastewater on the vegetative growth, wood properties, and chemical composition of tree, heavy metals accumulation by forest trees and it s role on heavy metals phytoremediation, and soil properties. Laboratory data and practical field experimentation are provided in this book to prove the potentials available within this study. This book would be useful for the environmentalists, physiologists, forestry man, scientists, students and water specialists especially working in the broader area of wastewater irrigation.