Increasing issues of environmental degradation and global warming have extended the scope of environmental studies. Researchers and scholars are involved in spreading awareness regarding threats to the environment and devising preventive measures that will determine the future of our planet. Some of the major concerns of the environmentalists is to deal with challenges like deforestation, melting of glaciers and change in global climate. This book includes theories, practices and policies related to this field. It focuses upon the controversial and critical issues in different ecological areas. This text is beneficial for students to understand the consequences of human activity on the environment.