The Leventhal Map & Education Center at the Boston Public Library’s free exhibition “More or Less in Common: Environment and Justice in the Human Landscape” looks at how environmental issues and social issues have been intertwined in the past, present, and future. See both historic and original maps and visualizations, including Olmsted plans for Boston, and learn more about struggles for environmental justice at the local and global levels. Features programs and events as well as opportunities for teachers, students, and families.