Experts working in environmental or health field Patricia T. Bradt, PhD Environmental Science, Muhlenberg College John A. Cigliano, PhD Biology; Cedar Crest College Joseph C. Colosi, PhD Natural Science & Plant Ecology Chrysan Cronin, PhD Biology & Public Health; Muhlenberg College Dru Germanoski, PhD Geology; Lafayette College Doug Heath, PhD Geography & … [Read more...] about Signers: Precautionary Principle for Marcellus Shale