Book excerpt: This book explores the drivers and impacts of sand mining in the coastal areas of Lagos Nigeria. Based on empirical evidence, sand mining activity is driven by a number of urbanization-related factors while sand mining impacts are underlined by a number of sustainability-related factors. Four urbanization components describe the drivers of sand mining and four sustainability components describe the impacts of sand mining in Lagos. This book concludes on the puzzling dilemma of sand mining that supports thriving urbanization but undermines environmental sustainability in Lagos. Of course, sand mining has strong implications for environmental sustainability in Lagos coastal areas. This book is of immense benefit to environmental planners, city administrators, students of environmental science and the general public who have regards for environmental management.