The limit for carbon monoxide is 4.5 per cent of the exhaust gas.

尾气中一氧化碳的排放量限制在4.5% 以下。

《柯林斯英汉双解大词典》

Soil tilling releases carbon dioxide, and delivery vehicles emit exhaust.

耕作翻土会释放二氧化碳，而运输车辆会排放废气。

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Diesel exhaust particles, a major part of urban smog, consist of a carbon core coated with organic chemicals and metals.

柴油车尾气粒子，是城市烟雾的主要组成部分，是由外表包裹着有机化学和五金的碳芯组成的。

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They should get out and clear space around the vehicle's exhaust pipe to prevent the possibility of carbon monoxide poisoning.

VOA: special.2011.01.11

This means the exhaust will include carbon dioxide.

ECONOMIST: The dawn of micropower

Better yet, the carbon dioxide in the exhaust gases could potentially be captured and buried underground.

FORBES: Magazine Article

The caustic soda is then exposed to the power plant's exhaust, where it combines with carbon dioxide to create, over two steps, sodium carbonate and then sodium bicarbonate.

FORBES: Magazine Article