Common Current

Warren Karlenzig delves into the unique challenges of reducing carbon in cities, where efforts may be misplaced. Should your city focus on green building, traffic emissions or water treatment?

The US Department of Energy has created a software tool not unlike Sim City that can project scenarios for an actual population's energy, transportation and fuel needs. The software made its debut recently modeling a development in Jinan, China.

Since Denver Metro voters passed FasTracks in 2004, transit ridership has almost doubled. Warren Karlenzig looks at how they did it.

Warren Karlenzig looks for the best examples of sustainable developments in Asia to serve as examples for the growing region.

A new study from the Asian Development Bank predicts that 20 years from now, Asian cities will be responsible for more than half of the world's greenhouse gases.

Common Current recently released a report ranking U.S. cities on their ability to deal with a peak oil crisis. San Francisco comes out on top and Oklahoma City ranks last.

Report ranks largest 50 US cities by their readiness for $4+ a gallon gas and $100+ a barrel oil prices