There are different ways in which people try to deal with the problem of energy. One way is the greater production of common energy sources, such as coal, oil and gas. The trouble with these sources, however, is that they are not renewable (use again).
人们尝试用不同的方式来解决能源问题。一种方式是增加常用能源的生产，例如煤、石油和天然气。然而，这些资源的问题在于它们不可再生。
Another way is energy conservation, which means using energy more efficiently. In some very cold countries people build special houses to save energy. They place materials between the inside and the outside of the walls of the house to keep the cold out and the warmth in. The house is heated by the lights, the body heat of the people and the other equipment in it.
另一种方式是节能，更有效地使用能源。在一些非常寒冷的国家，人们建造特殊的房子以节省能源。他们将材料放置在房屋的内外墙之间，以御寒保暖。房子由灯光、人的体温和屋里的其他设备加热。
Finally, renewable energy sources are used even though they are often expensive to develop. One form of these is geothermal energy. In certain parts of the world the temperature of the earth increases thirty degrees centigrade with each kilometer down. At six kilometres, therefore, it rises to nearly two hundred degrees. To get the heat, water is pumped down into the rocks and back up to the surface. Heat from the earth is already used in certain countries.
最后，使用可再生能源，尽管开发起来往往很昂贵。其中一种形式是地热能。在世界某些地区，地球的温度每下降一公里就上升30摄氏度。因此，在六千米处，气温上升到近两百度。为了获得热量，水向下压入岩石，然后回送到地面。来自地球的热量已经在某些国家使用。
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