This book is written in accordance with the syllabus prescribed by HPU for Environmental Studies for engineering students. Various means can be adopted for creating mass awareness about the importance of conserving the environment. Making Environment Education as an compulsory subject can be a step towards this awareness. This reference manual covers environmental awareness, types of eco-systems, environmental or nature organizations, environmental models and natural resources, biodiversity, soil erosion, noise pollution, management, environmental impact analysis and laws.