老师你好！
As a result, the vehicle produces fewer pollutants 还是应该是 lesspollutant ?
We should save more energy and use fewer 还是应该是 less naturalresources ?
有道词典上看到以下例句：
Thusthe better producers gain ever more economic influence, and the worse commandever fewer resources.
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Whatcan BlackBerry do differently, with less money, less resources, and less time?
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以上2句，搞糊涂了，请教老师，谢谢！
1 pollutant为可数名词，这里需要用复数名词，应该用fewer pollutants.
2 当与more相对而言时，表示更少的意义时，less可以用在复数名词前，这种使用方法是非正式语体或习惯使用方法，用fewer则是合法使用方法，所以这个句子用less resources 和 fewer resources都是可以的。后者为正式语体。
关于less后接复数名词，the freedictionary有以下使用方法说明，可供参考：
usage: Many usage guides say that fewer should be used before plural nouns specifying individuals or distinguishable units: fewer words; no fewer than 31 of the 50 states. less, the guides maintain, should modify only singular mass nouns and singular abstract nouns . It should modify plural nouns only when they suggest combination into a unit, group, or aggregation: less than $50 ; less than three miles . Standard English practice does not consistently reflect these distinctions. The use of less or less than where usage guides recommend fewer is common in most varieties of English: less than eight million people; no less than 31 of the 50 states; We did more work with less people. Though these uses are often criticized, they appear to be increasing in frequency.
