在一项研究中，研究人员调查了南韩7大城市中超过4000宗的自杀事件，发现颗粒污染中的尖刺物提高自杀的可能性多达10%。

In one study, researchers examined more than 4, 000 suicides in seven major cities in South Korea. They found that spikes in particle pollution upped suicide risk by as much as 10 percent.

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作者指出，在中国，尤其是在像北京等大城市，空气中的粒子污染物气溶胶溶度的不断上升，是由大量化石燃料燃烧造成的。

The authors say that increased levels of aerosols — particles of pollution in the air above China — are caused by increasing fossil fuel consumption, particularly in big cities like Beijing.

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如果你曾经在晚上驾车到过一个大城市，并且远远地看到过它的光辉，你肯定见识过光污染。

If you've ever driven toward a big city at night and seen its glow from a great distance, you've witnessed light pollution.

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