The Center for the Study of World Religions at Harvard Divinity School has published a series of books, "Religions of the World and Ecology." These are excellent resources, containing information written by experts. The Gustavus library has the entire series. Use the call number information to locate the book on our shelves.
As an aside, even just searching "religion and ecology" in the catalog brings back a number of useful books.
Confucianism and Ecology by 
Hinduism and Ecology by 
Jainism and Ecology by 
Daoism and Ecology by 
Judaism and Ecology by 
Islam and Ecology by 
Buddhism and Ecology by Christianity and Ecology by 
Indigenous Traditions and Ecology by Books are shelved in general subject categories using the Library of Congress classification system. You may want to supplement your use of the catalog with browsing shelf areas for your topic. Below is a brief listing of some of the subject locations in the field of Religion.
