这在短期内比较昂贵，但它可能让你的车辆改用汽油、酒精或动植物油。
It can be quite expensive in the short term but it is possible to refit your vehicle to run on gas, ethanol or used fats and vegetable oils.
为了比较燃料间的区别，Jacobson分别计算了它们单独为全美车辆提供动力所产生的影响。
To compare the fuels, Jacobson calculated the impacts each would have if it alone powered the entire US fleet of cars and trucks.
调查结果认为，导致高致死率的原因在于在乡村公路上的驾驶员觉得路上车辆较少因而感觉比较安全。
The survey results suggest that this may be the case because motorists report feeling safer on rural roads because there is less traffic.
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