Top 8 Green Breweries

As selected by the Huffington Post:

New Belgium Brewery, Fort Collins, Colorado
The Fish Brewing Company, Olympia, Washington
The Alaskan Brewing Company, Juneau, Alaska
Full Sail Brewing Co. Hood River, Oregon
Brooklyn Brewery, Brooklyn, New York
Great Lakes Brewing Co., Cleveland, Ohio
Sierra Nevada Brewery, Chico, California
Lakefront Brewery, Milwaukee, Wisconsin 

for more info on each brewery check out the article:
http://www.huffingtonpost.com/2009/08/11/top-8-green-us-breweries_n_256368.html