煤炭燃烧的主要缺点——也是工业城市的特色——是烟尘、粉尘、灰渣和废气以及大量的温室气体二氧化碳污染了空气。

A major disadvantage of coal combustion-and characteristic of industrial cities-has been air pollution by soot, dust, ash, exhaust and large amounts of the greenhouse gas carbon dioxide.

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燃烧的废气所迸发出的火花，每到晚上就映红邯钢的夜空。

Shimmering yellow and raging red, Hangang's flare stacks burn off waste gases and inflame the night sky.

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要让这个设置运行，得先把它放在废气中。做实验时，夏尔马用的是蜡烛燃烧产生的废气。

For the device to work, it first needs to be exposed to exhaust. In his demo, Sharma uses the flame of a candle.

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