1.   Cleaning up road dust is one of the cheapest ways to reduce the pollutant.

2.   Advocates argue that ethanol burns cleaner than gasoline, and studies show that it does reduce certain pollutants.

3.   Catalytic converters are used to reduce pollutants from engines.

4.   Ethanol does reduce some pollutants, but it also adds to ground-level ozone pollution because it evaporates quickly, especially in hot weather.

5.   Gore favors the vigorous enforcement of clean air rules to reduce industrial pollutants, Bush favors a negotiated approach.

6.   One way to reduce indoor pollutants is to use effective furnace filters and regularly change them.

7.   The approach is patterned after an emission credit system designed for reducing acid rain pollutants in the United States.

8.   The cleaner-burning fuel reduces pollutants, but it can be expensive to make.

9.   The subject of the show is sustainable architecture, energy-efficient buildings that reduce air pollutants and cut dependence on fossil fuel.

10.   When standards for reducing airborne pollutants were first introduced, the category of low-emission vehicles, or LEVs, emerged.