The book “Environmental Science and Engineering” covers various aspects of environmental science, providing in-depth discussions on topics essential for understanding the natural world and the interplay between human activities and the environment. The authors, Mr. Karl Joseph Samuel, Dr. S. Manikandan, Dr. I. Ameeth Basha, and Mrs. A. Asha, have structured the content to encompass theoretical knowledge, practical insights, and case studies, making it a comprehensive resource for students, educators, and practitioners in the field of environmental science. The first section of the book introduces the concept of environmental studies, highlighting its scope, importance, and the need for public awareness to conserve natural resources. It discusses essential natural resources such as water, forests, minerals, and energy, emphasizing their sustainable use and conservation. The book delves into various ecosystems and biodiversity, explaining their structure, components, and the vital role they play in maintaining ecological balance. Pollution is another central theme in the book, where various types, including air, water, soil, marine, noise, and thermal pollution, are explored. The authors also discuss the social implications of environmental issues, focusing on sustainable development, water conservation, climate change, and the role of NGOs in environmental conservation. The final chapters examine the impact of human population growth on the environment, addressing concerns such as overpopulation, health, and urbanization. The book concludes with practical fieldwork studies and observations, urging individuals to take responsibility for preserving the environment through conservation efforts, awareness campaigns, and the adoption of sustainable practices. Overall, the book serves as an excellent guide to understanding the complex relationships between natural resources, ecosystems, and human society, making it an indispensable resource for anyone interested in environmental science and engineering.