Transportation systems are responsible for one fifth to one quarter of the world’s carbon dioxide emissions. In addition, greenhouse gases that are emitted by transportation means have been growing at a faster pace than in other sectors. And with the rising oil prices and concerns about peak oil, the conventional transportation means and especially cars are getting increasingly unsustainable.

There are currently no alternatives to the traditional means of transportation that could effectively replace the conventional ones. There are, however, ways to make transportation more environmentally friendly and more sustainable. Examples include:

While individuals can do a lot to reduce the impact of transportation on the environment, sustainable transportation systems also depend greatly on city infrastructure which should provide easy access to public transportation and appropriate bicycle and pedestrian pathways.