Ken Dunn One of the city’s earliest recycling advocates, Dunn founded the Resource Center, which has long run the kind of effective programs the city hasn’t. He’s also a leader in the more comprehensive field of sustainable development.

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Rebecca Stanfield An environmental attorney and the state director of the research and advocacy group Environment Illinois, Stanfield is a regional leader on clean air, clean power, and green public policy. Her organization is the one that marshals battalions of young people to hit the streets to collect signatures for its lobbying efforts, putting you on the spot with: “Do you have a minute to help the environment?”

Sadhu Johnston Johnston was an environmental activist in Cleveland until Daley recruited him for his administration. Now he’s commissioner of the city’s Department of Environment and a big reason the mayor has such a great reputation for supporting green construction.