Introduction
The environmental impact of transportation is significant. Transportation is a major user of energy, and it burns most of the world’s petroleum. This creates air pollution, including nitrous oxides and particulates, and is a significant contributor to global warming through carbon dioxide emissions. In fact, transportation is the fastest-growing contributor to carbon dioxide emissions.
Although environmental regulations in many countries have reduced the individual vehicle’s emissions, this has been offset by an increase in the number of vehicles on the road and airways. Methods to reduce the carbon emissions of vehicles need intensive ongoing research. New means of transportation must be developed alongside greater energy ...
