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.
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.
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.
在大城市里，在寒冷的冬季，许多老年人因呼吸污染的空气而死去。
In big cities during cold winter months, many old people die from the polluted air.
第二，随着大城市的汽车和公交车数量的增加，空气污染已成为在大城市生活的另一个劣势。
Second, with the increase of cars and buses in big cities, air pollution has become another disadvantage of living in big cities.
在大城市工作是一件喜忧参半的事，大城市生活方便和舒适，但是噪声污染和交通拥挤却是两大令人头痛的事。
Working in a big city is a mixed blessing, it is so convenient and comfortable there, but noise pollution and traffic congestion are two big headaches.
在大城市工作喜忧参半，在那里生活很方便、很舒服，但是噪音污染和拥挤的交通是两个让人很头痛的事。
Working in a big city is mixed lessing, it is so convenient and comfortable there, but noise pollution and traffic congestion are two big headaches.
在大城市里，噪音污染是无法避免的。除了忍受它你别无选择。
There is no way to avoid noise pollution in a big city. You have no choice but to live with it.
许多城市面临着空气污染和烟雾的问题，这些大城市能够在控制空气污染，汽车和工厂产生的烟雾的问题上做些什么呢？
Many cities have problems with air pollution and smog. What can big cities do to regulate the amount of air pollution and smog generated by cars and factories?
同时在我国大城市机动车排气污染已成为城市空气污染的主要源头。
At the same time the vehicle exhaust has become the primary source of air pollution in big cities.
在大城市里工作是喜忧参半的事，虽然很舒服和方便，不过噪音污染和交通堵塞却是两大头痛之事。
Working in a big city is a mixed blessing. It is so convenient and comfortable there, but noise pollution and traffic congestion are two big headaches.
最严重的污染威胁集中在大城市内或其附近。
The worst pollution threat is concentrated in and near large cities.
即使在夜晚，象纽约这样的大城市因光污染而灯火通明，使得观望星星困难。
Even at night, big cities like New York glow from light pollution, making stargazing2 difficult.
首先，在大城市执行此类政策有助于减轻空气污染，并有助于营造更加清洁的环境。
To begin with, imposing such measures in major cities can help alleviate air pollution and thus promote a cleaner environment.
在拥有好几个大城市的得克萨斯州，一项被称作“为得克萨斯植树”(Trees forTexas)的项目为减少污染和节能已经种植了13.9万棵树。
In Texas, home to several large cities, a program called trees for Texas has planted 139,000 trees to cut pollution and save energy.
此外，空气污染和雾霾在大城市也愈发严重，所以，为什么不执子之手，在小城市享受新鲜的空气和经济适用的生活呢？
Also, as air pollution and smog get more severe in big cities, why not enjoy the fresh air and affordable life in small cities with ones you love?
此外，空气污染和雾霾在大城市也愈发严重，所以，为什么不执子之手，在小城市享受新鲜的空气和经济适用的生活呢？
Also, as air pollution and smog get more severe in big cities, why not enjoy the fresh air and affordable life in small cities with ones you love?
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