In the UPSC preliminary examination, environmental studies are an essential component that tests candidates' understanding of sustainable development, environmental policies, and ecological issues facing India and the world. Questions often cover topics like biodiversity, climate change, and natural resources. Candidates need to grasp both the scientific aspects and the implications of environmental challenges on governance and policy-making. Given the rising importance of environmental issues in global discourse, mastering this subject is vital for aspirants aiming to excel in civil services.