Black carbon soot alone, which occurs when combustion is incomplete, is responsible for 30 percent of that melt.

单凭燃烧不完全产生的炭黑，就吃掉了这其中的30%。

Third, pollution from trucks and smoke covers glaciers with carbon soot so that their surfaces become darker and less reflective - causing them to melt more quickly.

第三，汽车尾气污染和烟雾使冰川被碳烟灰所笼罩，从而使冰川颜色变得更深而缺乏反射性——因而导致冰川加速融化。

These are pollutants, particularly ozone and soot, that do not hang around in the atmosphere as carbon dioxide does.

这些污染物，尤其是臭氧和煤烟，不像二氧化碳那样悬浮在大气中。

Some of the carbon therefore ends up as soot, rather than carbon dioxide, and oxygen that should be combining with carbon combines with nitrogen from the air instead.

其中的一些碳最终以烟雾而非二氧化碳的形式排放出来，而那些本该与碳结合的氧分子则转而与空气中的氮结合。

The soot produced by burning fossil fuels has a stronger warming effect because it contains a higher ratio of black carbon to sulfate, which reflects sunlight to produce a cooling effect.

燃烧化石燃料产生的煤烟增温效应较强，因为其中黑碳对硫酸盐的比例较高，而硫酸盐是可以反射阳光产生降温效果。