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IELTS Free Online Writing Practice - Is ocean acidification reversible?

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Task 2 Topic: "Is ocean acidification reversible?"

Model Answer:

Ocean acidification is a critical environmental issue that has arisen due to the increasing levels of carbon dioxide in the Earth's atmosphere, primarily caused by human activities. This essay will analyze whether ocean acidification can be reversed through natural processes or human intervention.

Firstly, it is essential to understand the causes and consequences of ocean acidification. As the concentration of CO2 in the atmosphere increases, more of this gas dissolves into seawater, leading to a process called "ocean acidification." This alters the chemistry of the ocean, making it more acidic, which in turn has several negative impacts on marine life. Many species are affected by this change in the ocean's pH levels, as it disrupts the calcification process for shell-building organisms such as mollusks and coral reefs. Consequently, these ecosystems face significant threats to their long-term survival.

Now, let us consider the potential for reversing ocean acidification. There are two primary ways this could be achieved: through natural processes or human intervention. On one hand, natural processes such as absorption of CO2 by the world's forests and oceans can slow down the rate at which CO2 is released into the atmosphere. Additionally, increased marine life could potentially sequester carbon dioxide as they grow and die, mitigating ocean acidification to some extent. However, these natural processes are not enough to reverse the trend in its entirety, especially given the rapid rate of CO2 emissions.

On the other hand, human intervention offers a more promising solution for reversing ocean acidification. Technological innovations such as carbon capture and storage (CCS) systems could reduce the amount of CO2 released into the atmosphere by capturing and storing it underground. Additionally, the promotion of sustainable practices in agriculture, industry, and energy production can help lower global CO2 emissions. If these measures are implemented effectively and at a sufficient scale, they may have the potential to slow down or even reverse ocean acidification.

In conclusion, while there is some degree of natural resilience within marine ecosystems, it is unlikely that ocean acidification can be fully reversed through these mechanisms alone. Human intervention in the form of carbon capture and storage technologies and a shift towards sustainable practices are essential to mitigate the impacts of ocean acidification and protect our planet's valuable marine resources.

Band Score: 7.5

The question structures align with those found in real IELTS testing, focusing on analysis, evaluation, and conclusion, which are key components of a Task 2 essay. The model answer provides a comprehensive overview of the topic, presenting both sides of the argument and supporting its position with relevant information.

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