Cities change the climate

Helen

Cities change the climate

城市改变气候

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Cities change the climate around you. In the country, there are trees, grass, lakes, and streams. In hot weather, the trees and grass cool the area around them. Lakes and rivers also cool the area around them.

城市改变你周围的气候。在乡村，有树木，草地，湖泊与河流。在炎热的天气，树木和草可以为周围的区域降温，湖泊和河流也可以为周围的区域降温。

But cities are not cooled in these natural ways. Cities are built of asphalt, concrete, iron, and steel. There are few trees and usually not much grass. Rain falls onto the streets and into the sewers.

但在城市，却无法用这些自然的方式降温。城市是由沥青，混凝土，铁和钢材构筑的。没有多少树，也没有没有太多的草。下点雨也沿着路边流进了下水道。

When the summer sun shines, streets and buildings take in the heat; after the sun sets, the streets and buildings throw off heat into the street. Once the sun sets, the countryside cools off, but a city may stay hot all night.

当夏日阳光普照时，街道和建筑物蓄积起热量；而在太阳下山后，街道和建筑物又将热量投放到街路上。太阳落山后农村就会自然降温，而城市可能会整晚都保持热量。

Cities are hotter than the countryside in winter, too. Standing near a car with its motor running, winter or summer, you will feel the heat thrown off by the engine. The heat comes from the gasoline burned by the engine. This heat warms the air and the ground around the car. Thousands of running cars are almost like thousands of small fires burning.

在冬天城市也比农村要热。站在一辆发动机运转着的汽车旁边，无论是冬季还是夏季，你都会感到发动机散发出来的热量。这种热量来自于由发动机燃烧的汽油。这种热量使得汽车周围的空气和路面升温。成千上万开着的汽车几乎就像成千上万的小火种在燃烧。

Carefully put your hand near a light bulb or television set. As you can see, electricity creates a lot of heat. This heat from electricity warms the house and the outside air.

小心地把你的手靠近灯泡或电视机，正如你可以看到，电产生了大量的热量，它会使得房子和外面的空气温度上升。

The heat given off by cities can affect the climate. Some experts even believe that cities can change the climate of the whole world. They think that air pollution may stop sunlight from reaching the earth. If less sunshine reaches the earth, the earth may become cooler.

来自城市产生的热量可以影响气候。一些专家甚至认为，城市可以改变整个世界的气候。他们认为，空气污染可能阻止阳光到达地球。如果到达地球的阳光减少，地球可能会变冷。

Still other experts think the world will get warmer. If the world did get warmer, great changes would occur. Ice near the North and South poles would melt. This would make the oceans rise. Cities near oceans — like Los Angeles, Boston, and Miami — would slowly be flooded. People living in these cities would have to move to higher land.

不过还有一些专家认为，世界将会变暖。如果世界的确变暖的话，将会发生很大的变化。南北两极附件的冰将会融化，这将使海平面上升。靠近海洋的城市 - 洛杉矶，波士顿，迈阿密等 - 会慢慢地被海水淹没。居住在这些城市的人们，将不得不转移到更高的地方。

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