To effectively study environmental policies for the UPSC exam, aspirants should focus on understanding core concepts, frameworks, and recent developments. First, following relevant books, reports, and policy documents can provide foundational knowledge. Additionally, analyzing case studies and success stories of environmental initiatives can enrich understanding. Regularly reviewing changes in national and international environmental laws is also essential. Engaging in discussions and brainstorming sessions with peers enhances insight. Finally, keeping updated on climate change and sustainability issues can help in tackling questions confidently in the examination.