Abbott Laboratories

Allied Waste

Altria Corporate Services, Inc.

Archdiocese of Chicago

Chicago Dept. of Environment

Chicago Dept. of Streets and Sanitation

Chicago Park District

Chicago Public Schools

Coca-Cola Enterprises, Inc.

Commonwealth Edison Company

Cook County, President’s Office

The Dow Chemical Company

Earth Tech, Inc.

Fleishman-Hillard, Inc.

Free Green Can

Howe & Hutton, Ltd

ITW Hi-Cone

Kraft Foods Global, Inc.

Malcolm P. Chester Consulting

Masterfoods USA

Midwest Generation

Miller Brewing Company

Motorola

MRC Polymers

N'Digo

Office Depot

Pepsi Americas

Quarles and Brady

QTG/PepsiCo

Rexam Beverage Can Company

Sonnenschein Nath & Rosenthal LLP

Waste Management

Wm. Wrigley Jr. Company