The chemical fumes combined with the water droplets in the fog to form harmful substances.

化学烟尘与雾气中的水珠结合在一起形成有害物质。

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Environmental or occupational irritants - Dust, smog, chemical fumes, second hand smoke or strong odours such as perfumes.

环境或职业的刺激-粉尘，烟雾，化学气体，二手烟或强烈的气味，如香水。

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Moisture increases the fading rate, while chemical fumes will change the color balance and eventually ruin the dye images.

潮湿会加速褪色，而化学气味则会导致彩色平衡的改变，甚至损坏染料影象。

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Miners and workers in chemical industries also are vulnerable because of their exposure to dust, harmful chemicals and fumes.

VOA: standard.2010.06.21

Sometimes the problem is temporary, the result of an environmental insult like cigarette smoke or chemical fumes.

WSJ: How to Sharpen Your Sense of Smell

The mayor assured city residents that the air is safe, despite lingering concerns over asbestos, chemical fumes and smoke.

CNN: New York issuing 'recovery notes' to help city rebuild

The resulting chemical reaction converts the nasty NOx fumes into nonpolluting nitrogen, water and carbon dioxide.

FORBES: Clearing the Air