The underlying premise of this study is captured in the first verse of Psalm 24, which states that "the earth is the Lord's" and no one else's. This is a major theological tenet that undergirds the biblical tradition. Insights from contemporary science prompt us to look anew at our understanding of the natural balance within the universe and at humankind as a manifestation of life within that universe. Theology calls us to reexamine the role that worship plays in our acknowledgment of these realities. After a discussion of some scientific principles, the book examines several biblical themes in order to discover how they might help to fashion a liturgical perspective that is faithful to biblical faith and contemporary in its eco-sensitivity.