Charity Vitale has a Ph.D. in biology from Georgetown University. She taught biology at St Joseph's College in Philadelphia. She has done biophysical research at the National Biomedical Research Foundation in Washington, D.C., and is the author of several scientific publications.
Joyce Schoemaker received a Ph.D. in microbiology from Jefferson Medical College in Philadelphia. She has taught and done research in molecular biology at the University of Chicago and has held positions in research and management at several biotechnology companies. She is the author of numerous research publications.
Both authors have been actively involved with environmental issues in their communities.