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IELTS Free Online Writing Practice - Ocean Acidification Reversible or Irreversible?

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Task 2 Writing Topic: Ocean Acidification - Reversible or Irreversible?

In this essay, you are asked to take a position on the question of whether ocean acidification is reversible or not. You will need to discuss the causes and effects of ocean acidification, and provide your own opinion on whether or not it can be reversed. Make sure to use relevant examples and evidence to support your argument.

Model Answer:

Ocean acidification, a significant consequence of human-induced climate change, has raised concerns about the potential long-term impacts on marine ecosystems. While there is no doubt that ocean acidification is a pressing issue, it remains uncertain whether or not this process can be reversed in the foreseeable future. This essay will discuss the causes and effects of ocean acidification and examine the possibility of its reversal.

Ocean acidification is primarily caused by the increased concentration of carbon dioxide (CO2) in the Earth's atmosphere due to human activities such as deforestation, burning of fossil fuels, and industrial processes. As CO2 dissolves in seawater, it forms carbonic acid, which reduces the pH level of ocean water. This leads to a series of negative effects on marine life, including coral bleaching, reduced shell formation in some species, and alterations in the behavior and physiology of marine organisms.

It is important to note that the process of ocean acidification is closely intertwined with other environmental issues such as global warming and loss of biodiversity. As a result, addressing these broader problems may help mitigate the impacts of ocean acidification. For instance, reducing CO2 emissions through cleaner energy sources, sustainable agriculture practices, and reforestation efforts can alleviate the rate at which oceans are becoming more acidic. Furthermore, adopting marine protection measures such as no-fishing zones, stricter regulations on fishing methods, and restoration of damaged coral reefs can help maintain the resilience and diversity of marine ecosystems, making them better equipped to cope with changes in ocean chemistry.

However, it is unlikely that ocean acidification can be completely reversed, at least within a timescale relevant to humans. The process of neutralizing the excess CO2 in the oceans would require removing vast amounts of CO2 from the atmosphere, which is an enormous challenge given our current technological capabilities and understanding of carbon sequestration. While it may be possible to slow down or reduce the rate of ocean acidification by mitigating the primary causes, achieving a significant reduction in the acidity levels seems highly unlikely in the near future.

In conclusion, while efforts to address climate change and its associated environmental impacts are essential, ocean acidification poses a complex challenge that may not be fully reversible. Although it is possible to slow down or lessen the severity of this issue through global cooperation and the implementation of sustainable practices, completely restoring ocean pH levels to their pre-industrial state appears unattainable within a human timescale.

Overall Band Score:
- Task Response: 9
- Coherence and Cohesion: 8
- Lexical Resource: 7
- Grammatical Range and Accuracy: 8

Total Score: 32/40 (Band 7.5)

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