Following the example of Canmore, Canada, the twin ports of Duluth, Minn., and Superior, Wis., are seeking to reinvent themselves as green communities using a Swedish methodology known as "The Natural Step." With nearly $200,000 in funding from private foundations, the towns will seek to reduce their carbon footprints, share natural resources and reduce the use of synthetic substances. Officials hope to replicate the success of Canmore, which transformed from a blighted former coal-mining town to one of Canada's best-rated cities for quality of life.

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