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Air pollution has been more serious all over the world. What are the main reasons leading to this problem?
It is widely believed that air pollution has been a severe problem all over the globe. This essay will indicate several reasons leading to this fact. Firstly, the rapid growth of the population leads to more demand for things such as food and accommodation. This can be understood that people have to cut down more trees in the forest to have more land for cultivation and buildings. As a result, there may be more carbon dioxide in the air since the number of trees that give off oxygen has decreased. In other words, the air is becoming more and more polluted. Secondly, the rapid development of the population is also attributed to the increased quantity of factories to produce more goods. When the factories operate, they will probably release a huge amount of carbon dioxide into the air. As a consequence, the quality of the air will deteriorate.

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Are you trying to write an entire essay or just one paragraph?