This lesson was provided by the Ecology Center of Ann Arbor and may be distributed freely so long as credit is given to the Center. The Ecology Center of Ann Arbor is a nonprofit environmental group now celebrating 26 years of environmental action and advocacy. The Center provides environmental information and workshops for the community.

For more information, write:

Ecology Center
117 N. Division St.
Ann Arbor, MI 48104

Or, contact:

Ruth Kraut
313-995-5888

Fax: 313-663-2414