The Rise of Disposable Products: A Critical Analysis of the Throwaway Society

Overall, your essay is well-structured and you present your ideas clearly. However, there are a few areas where you can improve the grammar and sentence structure. Here are some suggestions:
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1. In the introduction, instead of saying "two main reasons contributing to this situation are that," you can use a more concise phrase such as "two main reasons for this are."
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2. In the first paragraph, instead of saying "the enhancing of economic level," you can say "the improvement in the economic level."
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3. In the second paragraph, instead of saying "the practice of not reusing objects results in an increasing amount of waste," you can say "the practice of not reusing objects leads to an increasing amount of waste."
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4. In the same paragraph, instead of saying "As a result, fewer trees are carrying out photosynthesis leading to the severe problem of greenhouse effect," you can say "As a result, fewer trees are able to carry out photosynthesis, leading to the severe problem of the greenhouse effect."
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5. In the third paragraph, instead of saying "Eventually, this threats people’s health as contacting with a large amount of plastic may results in cancer," you can say "Eventually, this poses a threat to people's health as contact with a large amount of plastic may result in cancer."
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6. In the conclusion, instead of saying "Hence, only if we contribute to cut down the use of disposable items can we avoid above problems," you can say "Hence, only by reducing the use of disposable items can we avoid the aforementioned problems."
   
   In addition to these suggestions, I would also recommend proofreading your essay for minor grammatical errors and ensuring consistent use of verb tenses throughout. Overall, your ideas are well-developed, and with these improvements, your essay will be even stronger.