Catalytic converters reduce carbon monoxide, oxides of nitrogen, and volatile organic compounds in emissions and necessitated the use of lead-free fuel. 催化转炉减少了一氧化碳,氧化氮和挥发性有机混合物等的排放,而且无铅燃料的应用也当成为必要。
The tax on lead-free fuel is likely to go up less than that on leaded fuel. 无铅燃料加的税可能比含铅燃料加的税上涨幅度要小。