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IELTS Free Online Writing Practice - Is ocean acidification reversible?

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IELTS Writing Task 2 Topic: "Is ocean acidification reversible?"

Model Answer:

Ocean acidification is a significant environmental concern caused by the absorption of carbon dioxide from the atmosphere by seawater, leading to an increase in hydrogen ions and a decrease in pH levels. The question of whether ocean acidification is reversible is multifaceted and depends on various factors such as human intervention, natural processes, and the rate at which carbon dioxide emissions continue.

One perspective on the reversibility of ocean acidification is through natural processes. Oceans have a certain degree of buffering capacity to absorb excess CO2, which helps stabilize pH levels. Furthermore, the ocean's ability to absorb and store CO2 could be enhanced by increasing marine biodiversity, as some organisms such as coral reefs and sea grass beds can promote carbon sequestration. If human activities reduce greenhouse gas emissions significantly, natural processes might gradually restore ocean pH levels over an extended period of time. However, these natural processes are limited in their capacity to counterbalance the rapid increase in atmospheric CO2 concentrations resulting from human activities.

Another aspect to consider is the role of human intervention in mitigating and potentially reversing ocean acidification. Technologies such as carbon capture and storage (CCS) can be employed to reduce CO2 emissions, which would subsequently decrease the rate at which oceans absorb excess carbon dioxide. Additionally, efforts to protect and restore marine ecosystems, such as mangrove forests and kelp beds, could enhance the ocean's resilience and capacity to cope with acidification. If these interventions are effective and sustained over time, it is possible that ocean pH levels may eventually stabilize or even recover.

In conclusion, the reversibility of ocean acidification depends on a combination of natural processes, human intervention, and the extent to which carbon dioxide emissions continue. While there is potential for recovery if significant reductions in CO2 emissions are achieved and effective mitigation strategies are implemented, it is unlikely that the process can be fully reversed due to the magnitude and pace of ocean acidification caused by anthropogenic activities.

Task 2 Score: Band 9

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