The Changing Environment by Raj Kr. Pruthi deals with changes in the natural and human environment and their effects on society and human life. The subject focuses on understanding environmental transformations, the relationship between humans and nature, and the challenges arising from environmental degradation and unsustainable development.

The book's subject matter is relevant to issues such as pollution, deforestation, climate change, population growth, depletion of natural resources, and ecological imbalance. It highlights the importance of environmental awareness, conservation, sustainable development, and responsible management of natural resources.

The book may be useful for students, researchers, and readers interested in environmental studies, social development, and the impact of environmental changes on human society.