Johns Hopkins University's website on Chaos and Fractals has a short explanation of the butterfly effect.
Silf, Margaret. One Hundred Wisdom Stories from around the World (Cleveland: The Pilgrim Press, 2003).
Tom Owen-Towle is the author of "Welcome to Unitarian Universalism: A Community of Truth, Service, Holiness and Love," a pamphlet that describes Unitarian Universalism as "a community of love."
Unitarian Universalist Association. Singing the Journey: A Supplement to "Singing the Living Tradition" (Boston: Unitarian Universalist Association, 2005).
Unitarian Universalist Association. Singing the Living Tradition (Boston: Beacon Press, 1993).
Wasserman, Dale. Man of La Mancha. New York: MCA Records, 1965. This original Broadway recording includes Richard Kiley singing "The Impossible Dream."
Library Index has articles about the environment, including one on "Factors that Contribute to Species Endangerment."
Word Ark, the magazine of Heifer International, has an article on the carbon footprint of livestock.
The National Resources Defense Council offers links to dozens of websites for young people on the environment.