Title: American green
Subjects: American National characteristics, Case studies, Economic conditions, Financial crises, History, Nature, Public spaces, Social aspects of Financial crises, Social aspects of Nature, Social aspects of Public spaces, Social classes, Social conditions, National characteristics, american, Social classes, united states, Nature, effect of human beings on, Social aspects
Places: Central Park (New York, N.Y.), United States, Yellowstone National Park, Yosemite National Park (Calif.)
Time periods: 19th century