The main pollutants of coal-firing boilers include dust, sulfur oxide, nitrogen oxide and carbon dioxide.

燃煤锅炉的主要污染物包括粉尘、硫氧化物、氮氧化物和二氧化碳。

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A research official said 1998 figures were used because the year marked the highest level of sulfur oxide emissions in China.

一位研究官员解释到，因为1998年是中国硫化物释放含量最高的一年，因此这一年的数字被用来研究。

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The negative C-type retardation compensator for the liquid crystal display includes polyarylate having a thio group or a sulfur oxide group in a polymer main chain thereof.

该用于 液晶显示器的负C-型延迟补偿器包括在其聚合物主链上含有硫基或氧 化硫基的聚芳酯。

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Fuel cells offer several advantages: they do not have moving parts and there is no burning involved, so there are negligible emissions of environmentally harmful gases like nitrogen, sulfur oxide and carbon monoxide.

FORBES: Magazine Article

Ertel was soon a big producer at Natsource, trading sulfur dioxide, nitrogen oxide, carbon and even weather derivatives.

FORBES: Selling the Blue Sky

The Indiana-based utility is investing in the required equipment to reduce its sulfur dioxide, nitrogen oxide and mercury pollution.

FORBES: Coal Plants Belching Out Less Mercury