David Orr, a longtime leader of the environmental movement, will lecture at Iowa State on Monday night.

His lecture, “Dangerous Years: Climate Change in the Long Emergency,” will take place at 8 p.m. in the Great Hall of the Memorial Union.

Orr is currently the Paul Sears Distinguished Professor of Environmental Studies and Politics and senior adviser to the president of Oberlin College. He has authored several books, including “Down to the Wire,” The Last Refuge,” “The Nature of Design,”” Earth in Mind” and “Ecological Literacy.” He also is co-editor of “Hope is an Imperative.”

The Symposium on Sustainability will host a poster display and reception before the lecture from 6:30 p.m. to 8 p.m. in the South Ballroom of the Memorial Union.

The lecture is also sponsored by Live Green Initiative, MFA Program in Creative Writing & Environment, Office of Sustainability, Pearl Hogrefe Fund, The Green Umbrella, Writers’ Guild and the Committee on Lectures.