For example, lightweight, two-passenger vehicles can be up to ten times more energy efficient than a typical car. In the United States, where 90% of automobiles carry one or two people, reliance on such vehicles would result in a dramatic decline in carbon emissions, which would fall even further as a result of less road congestion and smoother traffic flows.
比如，轻型两座汽车可以比典型的汽车拥有高十倍的能源效率。在美国，90%的汽车上只有一到两个人，推广这类汽车将极大地降低碳排放，而由此带来的道路拥挤改善和交通流平稳化还能进一步降低碳排放。此外，停车所需要的土地和基础设施也会大大降低。