For acquiring knowledge in environmental economics for UPSC prep, candidates can utilize a variety of resources. Key texts include foundational books like "Environmental Economics" by Field and "Natural Resource Economics" by Tietenberg. Online platforms offer courses on subjects related to eco-policy, which can be beneficial. Additionally, exploring Government of India's reports, such as those from the Ministry of Environment and eco-centric NGOs, provides valuable insights. Engaging with research papers and academic journals enhances depth of understanding. Lastly, attending relevant workshops or seminars can expand knowledge and foster networking with experts in the field, enriching preparation for the UPSC examination.