An old chimney on a city-owned property in Ann Arbor serves as a a roosting news for Chimney Swift. The migratory birds don't relocate easily so losing the chimney at 415 W. Washington could be damaging to the local population. In this week's "Issues of the Environment," WEMU's David Fair talks to Cathy Theisen from the Washtenaw Audubon Society about working with the City of Ann Arbor to advance protections.