Renewable Energy Sources - A Brief Summary 可再生能源-小结 It appears as though the crusade to determine the best alternative energy sources is seriously being looked into by lots of countries inclu
ding most American cities. One validation is the signing of the Kyoto Treaty. The primary purpose of the concerned group and individuals is to decrease the greenhouse gases and pollutants. 似乎很多国家，包括大多数美国城市，开始了认真研究能源代替 的最好选择的运动。 《京都议定书》的签订是一种认定证明。关心这 一事件的团队或是个人的最初原因，就是减少温室气体的排放和污 染。 These renewable energy sources have demonstrated to be of great aid in cutting down the amount of toxins, which are by-products（副产 物） of the consumption（消费，消耗） of energy. These sources also preserve most of the natural resources that people use as resources of energy. For example, after a solar panel converts the sun's rays into energy, the sun will still shine for someone else to use. What are the most popular sources of renewable energy? Here's a list to give you some basic information: 这些可再生能源也证明了， 它们对于减少能源消耗的副产物—— 毒素来说，有很大帮助。这些可再生能源，也保护了大部分人们当做 能能量来源的自然资源。例如，在太阳电池板把太阳光线转化成能量
之后，太阳仍然发光供其他人利用。那最受欢迎的可再生能源是什么 呢？下面是一个可以提供给你一些基本信息的列表： 1. Solar Energy - Harnessing the sun's powerful energy is definitely not something new. Capturing the radiant light and heat from the sun has been practiced since ancient times. Since the rapid evolution of technology, we are now able to trap the sun's rays into solar cells. Since the 1950's solar cell technology has been advancing and has come quite a long way. The process turns the heat coming from the sun into electricity. Photovoltaic cells mounted on rooftops are used to heat water using the sun's rays. The water goes into a storage tank where the power is stored, ready for use. But you don't need all these scientific processes to be able to benefit from solar power. All you really have to do is open the windows and blinds on a nice sunny day to let the sunshine in. 1.太阳能 - 利用太阳强大的能量绝对已不是什么新鲜事。 从远古时代 开始，捕捉到太阳的光束跟热量就已经在实际中被应用。随着科技的 快速发展，我们已经能够把太阳光储存在太阳能电池里。自从 19 世 纪五十年代开始， 太阳能电池的技术已经很先进， 也已有了很大进步。 这项转变热量的技术，将太阳能转变为电能。放在屋顶的光电电池， 可以利用太阳能来加热水。水进入存储能量的储存箱里，当做备用。 但是你不需要了解所有这些能从太阳能获益的科学过程。 只要在阳光 四溢的大好天气，打开门窗让太阳光照进来，就能满足你的需要。 To date, the main disadvantage of using this source is that it is
limited. You cannot use it obviously on nighttime and during days when it is raining or even on cloudy days. This has been acted upon through solar power stations. But these are too expensive so there aren't too many of these stations around the globe. 至今来说，利用这一资源的主要弊端就是，这个资源是有限的。 很明显，在夜晚或者甚至是一些阴雨天气你都不能使用这一资源。这 一问题可以通过太阳能发电站解决，但是这些发电站花费太高，以至 于在全球这种发电站都没有太多。 2. Wind Energy - Another ancient source of power, wind energy has been harnessed by sailors, farmers and architects for many years, even documented as far back as 5,000 years ago. The energy coming from the wind supercharges the blades of the wind turbines. As this happens, electricity is produced through the use of an electrical generator. In the old days, windmills were created so that mechanical machinery could perform physical labor. This includes the pumping of water and crushing of grains that were essential in planting and farming. 2.风能--在 5000 年前就有文献证明，另一种古老的能源，风能曾被水 手、 农民和建筑师开发利用。 当风吹到风力涡轮机的风叶上使之负重， 随之就产生了风能。在这种情况下，发电机就产生了电。过去，有人 发明了风车，所以机械产品就可以用来代替人工劳力。这包括了泵水 和蹍谷，这在种植业中是至关重要的。 Now there are large scale wind farms that produce electrical currents.
The end products are then distributed to national electrical grids（输电网 络） and small turbines owned by individuals to distribute electricity to far flung areas and homes. There are many advantages of this kind of power. The main one, of course, is that this doesn't produce any by-products that can be harmful to the environment. And we will never run out of this source of renewable energy. One of the main disadvantages of wind power is that it's never a constant speed or direction, so wind turbines have to be able to move with the direction of the wind. 现在，有大量可以产生电流的风力发电厂。然后最终产品分配给 国家电网和私人小型涡轮机以供遥远的地区和家庭用电。 这种能源有 很多优点。最主要的，当然是它不产生对环境造成危害的副产物。我 们永远也不会用完这种可再生能源。 风能最主要的一个缺点是它不会 是一种持续的速度或方向，所以风力涡轮机需要能够随风向而移动。 3. Geothermal - Geothermal energy is energy obtained by tapping heat from the earth itself. Holes are drilled in certain regions, and the magma and radioactive decay that can be found underneath produce steam. This steam is purified and used to drive turbines. These turbines then become the power source for electric generators. 3.地热-地热能源来自于地球本身的热量。 在某些地区钻孔， 地底下的 岩浆和放射性衰变会产生蒸汽。 这些蒸汽被净化并用于驱动涡轮机转 动。然后这些涡轮机成为了电动发电机的动力能源。
The downside （缺点， 下降趋势？） of geothermal energy is the fact that it is expensive to build, and to ensure that no harmful by-products are going to be produced in the process, geothermal plants must be created accordingly. On the other hand, because the earth's crust continuously decays replenishing the heat, it is still a renewable source of energy. 地热的缺点是它太昂贵， 并且为了确保在生产过程中没有有害的 副产物产生，地热发电站也要相应的建造。另一方面，因为地壳会不 断（腐烂，衰退？）以不断产生热量，所以它仍是一种可再生能源。 4. Hydroelectricity - The use of hydroelectric power or even hydroelectricity dates back to Ancient Greece and China where they installed waterwheels in rapidly flowing rivers to turn millstones and other equipment. Hydroelectric plants today still use the same basic principles as the historical waterwheel, but with some variations. The difference is that we use the force of the water to push the turbine which in turn powers a generator thus generating electricity. The idea here is to make use of the kinetic energy of water. To make sure that there is a steady flow of power being produced, a dam has to be built to retain the water. If there is a need for more power, the gates of the dam are opened so water can be released. There are issues with the use of hydroelectricity. Some claim that it poses a problem for fish and aquatic plants on both sides of the dam. Because the flow of water has been altered, the nutrient rich silt which
helps crops grow could be affected. 5. Bio-Fuels - Bio-fuels are also a green energy source. They have been around for a very long time however just lately people are beginning to take notice. During photosynthesis, plants grow and produce biomass. Also known as bio matter, biomass can be used directly as fuel or to produce bio-fuels. Agriculturally produced biomass fuels, such as bio-diesel, ethanol can be burned in internal combustion engines or boilers. Typically bio-fuel is burned to release its stored chemical energy. Liquid bio-fuel which is the one used in cars is a natural and renewable domestic fuel that can only be used for diesel engines. This can be made from vegetable oils mostly soy and corn. In fact diesel engines were originally created to run on vegetable oil! The nice thing about bio-fuels is that they contain no petroleum, and they are nontoxic and biodegradable. By fueling up with bio-fuel, you decrease the pollutants in the air because it does not emit anything. Right now, it is the only fuel approved by the Environmental Protection Agency (EPA), passed every Heath-Effects Test of the Clean Air Act and meets the requirements of the California Air Resources Board (CARB). Just by reading through the available alternative energy sources, you will be amazed at how nature works wonders. It is our responsibility to care for the environment around us and keep it clean for generations
ahead of us. (1004 words)