101.   The anti-pollution systems cut car and truck emissions of hydrocarbons, nitrogen oxides and carbon monoxide.

102.   The cleanest Suburbans emit twice the nitrogen oxides of the Accord or the Roadmaster.

103.   The EPA focused on what are called volatile organic compounds or VOCs substances that can combine with nitrogen oxides from car exhausts and other sources to form smog.

104.   The generator, which GE calls the H System, produces far less smog-causing nitrogen oxides than coal plants and some existing natural gas plants.

105.   The hybrid buses, however, produced more nitrogen oxide, which contributes to ground-level ozone.

106.   The less stringent standard, introduced by negotiators for the Northeastern states Tuesday and Wednesday in Washington, would still mean a significant drop in nitrogen oxides.

107.   The new test checks for vehicle emissions of nitrogen oxides, a component of ozone smog.

108.   The next year, he joined Harris County leaders, businesses and environmental leaders in drawing up guidelines for reducing the emissions of nitrogen oxides and volatile organic compounds.

109.   The new measures are designed to eliminate smog-producing nitrogen oxides and particulates.

110.   The new rules will control nitrogen oxides and sulfur oxides from petroleum.