Friends of Sears Island will host a presentation on the history of air pollution in Maine by Dr. Stephen Norton, at the Belfast Free Library on June 5th, at 6:30pm. Humans have only been able to accurately characterize the chemical climate of Earth for about 50 years. To study pollution prior to the 1950s, scientists study the archives of pollution that are stored in soils, tree cores, museum collections of vegetation, ice cores from high elevation and/or high latitude, lake sediments, and peat accumulations in bogs. The evening presentation will focus on what soil surveys, lake and peat sediments can reveal, and if time allows, a few comments on the other archives.

Steve Norton is a Professor Emeritus in the School of Earth and Climate Sciences at the University of Maine. He graduated from Princeton and Harvard University, earning his PhD in 1967. He joined the Department of Geology faculty at the University of Maine in 1968 where he taught and did research until his retirement in 2008. His research is in the field of aquatic geochemistry.

This program is free and open to the public. To learn more about Friends of Sears Island check out For program updates in the event of inclement weather, visit or call 207-975-3878.