CO_2排放物在今后10年很可能导致全球变暖,车辆是CO_2排放物的主要来源。对付这一问题的一种明确的办法就是开发低油耗发动机。另一个辅助的办法就是采用天然的可回收的物质做燃料。柴油发动机可选用的一种理想燃料是菜 CO2 emissions are likely to lead to global warming in the next 10 years and vehicles are the main source of CO 2 emissions. A clear solution to this problem is to develop a low-fuel-consumption engine. Another complementary approach is to use natural, recyclable materials for fueling. An ideal fuel for diesel engines is vegetable