Critical areas to study for Environmental Ecology in UPSC include understanding ecosystem dynamics, biodiversity, and the impact of human activity on the environment. Topics such as climate change, pollution, and resource management are fundamental, as they relate to national and international environmental challenges. Knowledge of ecological principles, conservation methods, and sustainable development practices is also essential. Additionally, awareness of current environmental policies and legislation enhances preparation by tying theoretical concepts to practical implications. Thorough comprehension of these elements equips candidates to navigate related questions effectively in examinations.