According to this scientist it may be feasible to harness the power of tornadoes to generate electricity. Essentially these power plants would create safe vortexes which are fed through turbines. It's estimated a power plant of this type could generate 200 megawatts of electricity enough for a small city.
city
Generating electricity from man made tornadoes

Residential Solar Panels to Get Cheaper in California
California city and state officials are making residential solar panels cheaper for homeowners with some creative incentive programs.

Three Green Cities, Ripe for the Visit
Creative ideas for your greener city.
Top 5 Urban Design Greenificaitons
5 cool urban design ideas that bring a touch of green to the drab city gray
Video: Smart, Green Cities Conserve More Energy Than all Alternative Sources Combined
Rather than expanding current wind and solar power sources, energy experts indicate it is more crucial to eliminate and restructure current consumption methods. Jim Sweeney, an energy economist from Stanford University, says "freeing up 10 percent of current demand would leave more energy available than expanding all current wind and solar production tenfold." Echelon, a Silicon Valley-based company, indicates certain areas known as "smart cities" are doing this using networking technology.

Nissan Denki Cube Electric Concept Car
The Nissan Denki Cube all-electric concept car was unveiled at the 2008 New York International Auto Show and gives a glimpse at the future of EV's.
Recycle, Compost and Reuse = Lawsuit?
What happens when you recycle, compost, or craig's list all your trash and no longer need (or want to pay for) city trash service? If you live in San Carlos, CA, you can expect a lawsuit from the city.
Masdar: World's First Zero-Carbon City
Masdar City, the world first zero-carbon city, will look strikingly different from today's urban hubs. There will be no sky scrapers or cars. Instead, the city will consist of low-rises lined with solar panels to take advantage of the near-constant sunshine. It's 50,000 residents will move around the 2.4 square miles of the city a series of transport pods which function much like horizontal elevators.

Taiwanese Solar Car May Debut This Year
A commercial version of the Taiwanese solar car that came in second place in the Australian World Solar Challenge this year may debut at an affordable price.
Trees in your city. Whats the scale of their contribution?
What impact do trees have in a city

Ikoo Electric Scooter
The Ikoo electric scooter has a high IQ when it comes to funky little green electric vehicles that one can use to zip around the city and traffic without burning an ounce of gasoline.

Over 100 US Mayors Pledge To Deal With Climate Problem
More than 100 mayors from across the United States convened in Seattle, Washington this week to discuss how cities can play a role in fighting global warming. As Amy Bickers reports from Seattle, the participants at the U.S. Conference of Mayors' Climate Protection Summit compared ways to slash carbon emissions while creating jobs and boosting urban economies.

World’s First Eco-Municipality, Boasts Freiburg, Germany
Big push for renewable energy, plus preserving their long history. The Black Forest town calls itself “the California of Germany.â€

VIDEO: How to Make Compost If You Live In The City
Good video that shows step by step how to make compost even if you live in the city. This is good if you live in an apartment and you thought you couldn't compost without making a mess. It's a lot easier than it seems!