When you think of the Los Angeles River, what images come to mind? Concrete? Maybe trash? Dirty water? When some people look at the river, they see willows and waterfowl… and they envision a future where the LA River is at the center of a greener city. All this week, KPCC’s environmental reporter, Ilsa Setziol, explores the dreams — and realities — of revitalizing the Los Angeles River.