Solar seems to be making waves in big business these days. As more and more companies strive to cut costs and reduce operating expenses, it seems that some have finally realized the economic viability of harassing free energy from the sun.

While it is true that installing solar arrays can be prohibitively expensive for small and medium sized businesses, bigger companies (who use more energy) have access to the resources necessary to make these concepts a reality. What’s great about large companies going green and building renewable energy projects is that, in addition to reducing their use of fossil fuels, the companies are paving the way and (hopefully) lowering the cost of installing these kinds of power projects.

In Contra Costa County, California, one of Budweiser’s cold storage facilities was recently fitted with a 16kW DC solar installation. Designed and installed by Perpetual Power, the installation includes 2,240 185Wp Mitsubishi Electric polycrystalline photovoltaic modules. Once the system is fully up and running, it is expected to produce approximately 60% of the building’s power needs. By adding a solar array to this facility, Budweiser is expected to save $100,000 annually in energy costs.

It seems as if Budweiser isn’t the only one who has noticed the relationship between more sustainable energy sources and tangible financial savings. FedEx Freight has a 282 kilowatt solar power system at its Whittier, California location, and produces 414,000 kilowatt hours of electricity annually. Alcoa – the mammoth Pittsburgh aluminum manufacturer installed a 588 kW, roof-mounted photovoltaic solar power system at one of its California locations in 2007. Stonyfield Farm has its own solar array too. Installed in 2005 at the company’s Londonderry, NH location, the company has a 50 kW solar photovoltaic array – the largest in New Hampshire.

Big businesses all over the country seem to be waking up to the realities of global warming, and rethinking how they do business. While a solar array here or a wind farm there might seem small in relation to how much we need to do to fight global warming, it’s important to remember that the tide is turning. Corporations tend to go where the money goes, so the fact that profitable businesses like Budweiser, Alcoa, FedEx and Stonyfield Farms are all using renewable energy to run their businesses, may mean that other big businesses aren’t too far behind.

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Although the environmental movement has been around for years, many communities are just starting to understand the importance of incorporating green practices into urban planning, business practices, and governmental regulations. Large and small cities have started writing green policies into their planning and development codes, and citizens are petitioning to get green initiatives on local ballots.

By demanding the incorporation of green practices and environmental regulations in planning and development decisions, environmental advocates are affecting how sustainability is incorporated in their towns and cities. When looking at cities across America, it’s easy to see that there are plenty of cities who have been “going green” for years (such as Portland, Oregon), and other communities that are just stepping up to the green challenge. Regardless of what cities have done in the past, the fact that so many cities are taking steps to build sustainability into their communities is good for everyone. In an effort to find the greenest places in America, I’ve compiled a list of the greenest American cities using surveys from Country Home, SustainLane, Popular Science and Our Green Cities.

Methodology

Though focused on the same end result (the greenest American city), each of these 4 organizations used different criteria in determining what makes a city green. In compiling their list, Country Home looked at the official energy policies, green power, green buildings, and the availability of fresh, locally grown food in each community. I was disappointed that the Country Home data wasn’t explained in greater detail, but also found it interesting that the cities on their list were comparable to the cities selected by the other organizations.

Popular Science provides the detailed methodology used in determining their top 50 cities, which includes a ranking of sustainable practices in the Electricity, Transportation, Green Living (buildings, construction, development), and Recycling/Green Perspectives of each city. If you’re interested in learning exactly how Popular Science selected their 50 greenest cities, make sure you check out these case studies that break down the methodology used in the survey.

To figure out their list of sustainable cities, Our Green Cities applied their own “Index of Taking Sustainable Cities Seriously,” a checklist that looks at smart growth activities, land usage, transportation, energy policy, pollution, and sustainable projects taking place in each of the cities. If you’re interested in what makes a city sustainable according to Our Green Cities, you can read their definition here.

SustainLane applied an impressively comprehensive method of determining the greenest cities in America, and offers an in-depth explanation of their methodology on their website. Using primary and secondary research to compile their list, SustainLane analyzed data collected from NGOs, city and state governments, federal agencies, their own interviews and surveys, and public data sources (such as academic research and media studies) to find the top green cities in America.

And the Winners Are…

1. Portland, Oregon

2. Greater San Francisco Bay Area, California

3. Seattle, Washington

4. Chicago, Illinois

5. Boston/Cambridge

6. Boulder, Colorado

7. Minneapolis/St. Paul, Minnesota

8. Eugene, Oregon

9. Denver, Colorado

10. Albuquerque, New Mexico

The cities on this list have worked hard to incorporate green building practices, renewable energy sources, and innovative land use policies into their communities. Portland has 35 LEED certified buildings and strict limits on development, while San Francisco has planted fruit trees on city streets and made recycling a top-priority. If you’re interested in learning more about the eco-policies that guide these cities, check out the SustainLane rankings. SustainLane provides a wealth of information on each of their top 50 green cities, and you might just find ideas on how you can get your own city on the list in coming years.

Additional Resources on Sustainable/Green/Eco-Friendly Communities

Center for Sustainable Cities

Sustainable Measures: Sustainable Community Indicator Checklist

Regional Environmental Center Sustainable Cities Project

The Institute for Sustainable Cities

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