9分雅思图表小作文范文全集之流程图 自然界碳循环

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9分雅思范文之流程图 自然界碳循环：The diagram below illustrates the carbon cycle in

nature.Write a 150-word description of this diagram for a university

lecturer.

范文集结：全部15篇9分雅思流程图范文汇总放送

范文

The diagram shows how carbon moves through various stages to form a complete

cycle. This report will give a brief description of the main stages in this

cycle.

First, we can see that energy from the sun is transformed into organic carbon

through a process in plants known as photosynthesis. This organic carbon is then

transferred underground when plants, and the animals that feed on them, die and

decay. Some of this carbon is trapped underground in the form of fossils and

fossil fuels.

Carbon is also released back into the atmosphere, however, through various

means. One is when animals and plants respire, and another is when humans burn

fossil fuels in cars and factories. All this carbon enters the atmosphere as

CO2. It is then reabsorbed by plants, and the cycle begins again.

Overall, we can see that carbon moves in a natural cycle, although human

factors may now be affecting the balance.

(154 words, IELTS 8.0)