Judy Vesel, Principal Investigator and Project Director

Linda Bean-Pardee, Project Designer
Bryce Flynn, Senior Web Designer and Illustrator
Robby Griffin, Web Support Specialist
Topher Hagemeier, Curriculum Developer
Arthur Johnson, Project Evaluator
David Libby, Director of Information Systems
Vanessa Layne, Web Toolsmith
Lisa M. Miller, Senior Web Developer
Matthew O'Toole, Web Consultant
Tara Robillard, Materials Developer and Evaluator
Laura Uhl, Editor

Heidi Carter, G. Michael Weaver, Lin-Wood Public Schools, Lincoln, N.H.; John Chicarello, Nancy Guzzi, Cyrus E. Dallin School, Arlington, Mass.; Sandy Coe, Roy Moore School, Silt, Colo.; Joni Cooke, Leeds Central School, Leeds, Maine; Robert Coulter, Forsyth School, St. Louis, Mo.; Stephanie Davis, John Greenleaf Whittier School, Chicago, Ill.; Mary Dietz, LaVonne Hartson, Tripoli Elementary, Tripoli, Iowa; Nancy Dillon, Willard School, Concord, Mass.; Andrea Doubet, Frank Williams, Grundy Center Elementary School, Grundy Center, Iowa; Joseph Eakle, Opequon Elementary School, Martinsburg, W.Va.; Jim Fisher, Tara Frazier, Barbara Walters, Woodley Hills Elementary School, Alexandria, Va.; Ann Fleckenstein, Irene Morley, Drew/Pyle Communication Arts School, Wilmington, Del.; Ethan Forbes, Demil Kovacevic, Butterfield School, Orange, Mass.; Bill Gorman, Brackett School, Arlington, Mass.; Barbara Haig, Brenda Lang, Lincoln Street School, Northborough, Mass.; Corinne Haselton, Mike Kennedy, Joanne Tuxbury, Sunapee Central Elementary School, Sunapee, N.H.; Dona Helmer, College Gate Elementary School, Anchorage, Alaska; Chandelle Hunt, Riverside Junior High School, New Castle, Colo.; Paula Magaletti, Ann Newbury, Heathcote School, Scarsdale, N.Y.; Todd Mell, Lynnwood Elementary, Schenectady, N.Y.; Dawn Pare, Lafayette Regional School, Franconia, N.H.; Cheryl Pucket, Karen Stinson, Sullivan Elementary School, Ulysses, Kans.; Bill Richard, Meadowbrook School, Weston, Mass.; Carol Russell, Liberty Elementary School, Valley Cottage, N.Y.; Dilys Staaterman, Countryside School, Newton, Mass.; Terry Tolson, Central Elementary School, Warrenton, Va.

Elena Dworkin Wright, Managing Editor

Concetta Brown, Production Designer
Claudette Dawes, Editor
Sarah McAbee, Production Designer
Alyssa Mito Pusey, Editor
Martha MacLeod Sikkema, Production Designer

This unit was developed by TERC and funded in part by the National Science Foundation, Grant ESI-9553592, and the National Geographic Society. All opinions, findings, conclusions, and recommendations expressed herein are those of the authors and do not necessarily reflect the views of the funders. A prior version of the unit was developed by TERC in collaboration with the National Geographic Society and published as the Acid Rain part of the National Geographic Kids Network series.