Environmental activism is nothing new to Madison. The city has been a steward of the land for generations and was the first city in the nation to offer a curbside recycling program.

In recent years, city government has pushed the envelope with the 100K Challenge -- a call to reduce carbon emissions as a city by 100,000 tons over 5 years.

In this story, hear what a renewable energy expert says about government's role in clean energy and see why the Mayor believes the city must take a stand.