The transport sector is one of the most important sectors for the European economy. Its importance stems not only from its size - which is estimated to be € 803 billion or 6.6% of European GDP in 2007 - but also from the fact that it plays a crucial role in connecting other economic actors...

As the worlds largest economy, the United States is also the largest consumer of fossil energy sources and the largest per capita emitter of greenhouse gases. Although the climate and energy policies adopted over the past decade have been insufficient to reverse continued emissions growth, a...