IELTS Writing Task 2: Climate Change and Infectious Disease Spread – Sample Essays and Analysis

Climate change and its impact on infectious disease spread is a topic of growing concern in global health. This issue has been appearing with increasing frequency in IELTS Writing Task 2 questions, reflecting its relevance in contemporary discussions. Based on recent trends, we can expect this theme to continue featuring prominently in future IELTS exams. Let’s examine a relevant question that has appeared in past IELTS tests:

Some people believe that climate change is causing an increase in infectious diseases worldwide. To what extent do you agree or disagree with this statement?

Analyzing the Question

This question requires candidates to express their opinion on the relationship between climate change and the spread of infectious diseases. Key points to consider:

1. The statement presents a cause-and-effect relationship between climate change and infectious diseases.
2. Candidates need to decide their level of agreement with this statement.
3. The phrase “to what extent” suggests that a nuanced response is expected, rather than a simple agree/disagree stance.

Sample Essay 1 (Band 8-9)

Climate change has emerged as one of the most pressing global issues of our time, with far-reaching consequences that extend beyond environmental concerns. One area of particular concern is its potential impact on the spread of infectious diseases. In my opinion, there is substantial evidence to support the claim that climate change is indeed contributing to an increase in infectious diseases worldwide, and I largely agree with this statement.

The link between climate change and infectious diseases is multifaceted and complex. Firstly, rising temperatures and changing precipitation patterns are altering the geographical distribution of disease vectors such as mosquitoes, ticks, and rodents. For instance, as temperatures rise, mosquitoes that carry diseases like malaria and dengue fever are able to survive in areas previously too cold for them, leading to the emergence of these diseases in new regions. This expansion of vector habitats significantly increases the risk of disease transmission to previously unaffected populations.

Furthermore, climate change is disrupting ecosystems and biodiversity, which can have indirect effects on disease spread. The loss of natural predators and the stress on animal populations can lead to increased interaction between humans and wildlife, potentially facilitating the transmission of zoonotic diseases. The recent COVID-19 pandemic serves as a stark reminder of the potential consequences of such interactions.

Climate-induced natural disasters and extreme weather events also play a role in exacerbating infectious disease outbreaks. Flooding, for example, can contaminate water sources and create breeding grounds for waterborne pathogens, leading to outbreaks of diseases such as cholera and leptospirosis. Similarly, droughts can force people to rely on unsafe water sources, increasing their exposure to various pathogens.

While it is important to acknowledge that other factors such as globalization, urbanization, and antibiotic resistance also contribute to the spread of infectious diseases, the impact of climate change cannot be overlooked. The scientific community has increasingly recognized this connection, with numerous studies highlighting the role of climate change in altering disease patterns and emergence.

In conclusion, the evidence strongly suggests that climate change is indeed causing an increase in infectious diseases globally. This underscores the urgent need for comprehensive strategies that address both climate change mitigation and adaptation, as well as strengthening global health systems to better respond to emerging infectious disease threats. Only through such integrated approaches can we hope to effectively manage this growing challenge to global health and well-being.

Climate change impact on infectious diseases

Sample Essay 2 (Band 6-7)

In recent years, there has been a lot of discussion about how climate change affects our world. Some people think that it is causing more infectious diseases to spread around the globe. I mostly agree with this idea because there are some clear connections between climate change and the increase in diseases.

One of the main reasons why climate change can lead to more infectious diseases is that it changes where certain animals and insects can live. For example, as the Earth gets warmer, mosquitoes that carry diseases like malaria can survive in new places where it used to be too cold for them. This means that diseases can spread to areas where people are not used to dealing with them, which can cause more people to get sick.

Another way that climate change affects diseases is through extreme weather events. When there are more floods or droughts because of climate change, it can create conditions that help diseases spread. For instance, floods can contaminate water supplies and lead to outbreaks of diseases that spread through water. Droughts can also force people to use unsafe water sources, which can make them sick.

Climate change is also changing the way humans and animals interact. As habitats change, some animals might move closer to human settlements, which could increase the chances of diseases passing from animals to humans. This is especially concerning because many new diseases that affect humans come from animals.

However, it’s important to note that climate change is not the only factor causing an increase in infectious diseases. Other things like more people traveling around the world and living in cities also play a role. Also, some areas might actually see a decrease in certain diseases due to climate change.

In conclusion, while climate change is not the only reason for the spread of infectious diseases, I believe it is a significant factor. The evidence shows that it is changing the environment in ways that can help diseases spread more easily. This means that as we work to fight climate change, we also need to think about how to prepare for and prevent the spread of infectious diseases.

Key Considerations When Writing

Vocabulary

When discussing this topic, it’s crucial to use appropriate vocabulary. Here are some key terms to incorporate:

• Climate change
• Infectious diseases
• Disease vectors
• Ecosystem disruption
• Zoonotic diseases
• Pathogens
• Globalization
• Urbanization

For higher band scores (8-9), use more sophisticated vocabulary and phrases such as:

• Multifaceted
• Geographical distribution
• Exacerbating
• Biodiversity

For band 6-7, simpler alternatives can be used while still maintaining accuracy:

• Complex
• Spread
• Making worse
• Different types of plants and animals

Grammar

To achieve higher band scores, demonstrate a range of complex structures:

• Conditional sentences: “If global temperatures continue to rise, we may see even more dramatic shifts in disease patterns.”
• Passive voice: “The link between climate change and infectious diseases has been extensively studied by researchers.”
• Relative clauses: “Climate change, which is primarily caused by human activities, is altering ecosystems around the world.”

For band 6-7, focus on using these structures correctly, even if less frequently:

• “Because of climate change, some diseases are spreading to new areas.”
• “Scientists have found that warmer temperatures can help some diseases spread faster.”

Challenging Vocabulary to Remember

1. Vector (noun) /ˈvektər/ – an organism that transmits a disease or parasite from one animal or plant to another.

2. Zoonotic (adjective) /zoʊəˈnɒtɪk/ – relating to a disease that can be transmitted from animals to humans.

3. Pathogen (noun) /ˈpæθədʒən/ – a bacterium, virus, or other microorganism that can cause disease.

4. Biodiversity (noun) /ˌbaɪəʊdaɪˈvɜːsəti/ – the variety of plant and animal life in the world or in a particular habitat.

5. Precipitation (noun) /prɪˌsɪpɪˈteɪʃn/ – rain, snow, sleet, or hail that falls to or condenses on the ground.

6. Ecosystem (noun) /ˈiːkəʊˌsɪstəm/ – a biological community of interacting organisms and their physical environment.

7. Mitigation (noun) /ˌmɪtɪˈɡeɪʃn/ – the action of reducing the severity, seriousness, or painfulness of something.

8. Adaptation (noun) /ˌædæpˈteɪʃn/ – the process of change by which an organism or species becomes better suited to its environment.

Conclusion

The relationship between climate change and infectious disease spread is a complex and increasingly relevant topic for IELTS Writing Task 2. As we’ve seen, this subject allows for in-depth discussion of various aspects, from environmental changes to public health implications. To prepare for potential questions on this topic, consider practicing with similar prompts such as:

1. “Some people argue that addressing climate change should be prioritized over fighting infectious diseases. Do you agree or disagree?”

2. “Discuss the ways in which governments and individuals can help reduce the impact of climate change on public health.”

3. “To what extent do you think international cooperation is necessary to address the link between climate change and infectious diseases?”

We encourage you to practice writing essays on these topics and share your attempts in the comments section below. This active practice is an excellent way to improve your writing skills and prepare for the IELTS exam.