Madrid: Changing behaviour towards sustainable transportation

Kit Sand Ottsen — Thu, 27 Aug 2009 08:29:00 +0000

The increasing population of Madrid’s (Spain) metropolitan area has caused a large percentage of people to commute to the inner city. Although Madrid has an efficient metro system, it still manages to be flooded with people at peak hours as citizens taking public transport choose the metro over other options such as busses or carpools on congested highways. However, these congested highways could be much more efficient and can still carry thousands more people – simply by increasing the number of passengers in each vehicle.

New York: Leading the way in tidal power

Christopher Mackey — Thu, 23 Jul 2009 11:04:23 +0000

Tidal energy has been, for many decades, coveted as a compelling but mostly unreachable source of sustainable power. As the second-most plentiful renewable energy source on the planet, it is much more abundant and reliable than wind power and has the potential to be useful in many coastal cities. However, up until the present, strategies for obtaining tidal energy, such as dam construction, were generally regarded as unsustainable since they often severely damaged coastal ecosystems and potentially prevented the flow of ocean sediments.