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IELTS Free Online Writing Practice - The role of urban green spaces in improving air quality

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Topic: The role of urban green spaces in improving air quality

Question: To what extent do you think the creation and maintenance of urban green spaces can contribute to the improvement of air quality in cities? Discuss the benefits, challenges, and potential solutions.

Model Answer:

Urban green spaces play a significant role in enhancing the overall air quality in cities. The creation and maintenance of these areas, which include parks, gardens, and natural landscapes within urban settings, can contribute to improved air quality through several mechanisms.

Firstly, trees and plants absorb carbon dioxide (CO2), one of the main pollutants contributing to poor air quality in cities. Through a process called photosynthesis, these green spaces help reduce the amount of CO2 in the atmosphere and release oxygen, thereby improving air quality. Additionally, vegetation acts as a natural filter, trapping dust particles, pollen, and other airborne contaminants, reducing the concentration of harmful substances in the air.

Secondly, green spaces can also have a positive impact on the urban heat island effect, which occurs when cities experience higher temperatures compared to their rural surroundings due to human activities such as construction and the use of energy resources. Urban green spaces can help mitigate this effect by providing shade and absorbing solar radiation, subsequently reducing the need for air conditioning, which in turn lowers emissions from power plants.

Despite these benefits, there are challenges associated with creating and maintaining urban green spaces. One major challenge is the availability of land space within urban settings, where space is often limited due to high population density and economic development. Additionally, the cost of establishing and maintaining green spaces can be prohibitive in cities with tight budgets or those experiencing rapid urbanization.

To address these challenges, cities should consider innovative solutions such as vertical gardens, green roofs, and the integration of green spaces into existing infrastructure like sidewalks and parks. Public-private partnerships can also be explored to share the financial burden and encourage collaboration between various stakeholders.

In conclusion, urban green spaces play a critical role in improving air quality within cities. By absorbing pollutants, mitigating the urban heat island effect, and reducing emissions from energy consumption, they contribute to a healthier and more sustainable urban environment. Despite the challenges, innovative solutions can be employed to expand and maintain these vital spaces, ensuring their continued contribution to better air quality in cities.

Overall score: Band 9

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