English guide
Four AI-scored IELTS Writing Task 2 model answers on air pollution (Bands 6–9), complete with TR/CC/LR/GRA breakdowns, 15+ topic vocabulary items, and examiner-tested strategies.
What this guide covers
Search answer
Four AI-scored IELTS Writing Task 2 model answers on air pollution (Bands 6–9), complete with TR/CC/LR/GRA breakdowns, 15+ topic vocabulary items, and examiner-tested strategies.
Related guides:
Author: Alfie Lim, TESOL-Certified Educator & Founder, English AIdol Last Updated: October 2026 Data Source: Analysis of 12,450 AI-scored IELTS essays on environmental prompts
Air pollution is one of the most pressing environmental challenges globally. What are the main causes of this problem, and what practical solutions can governments and individuals implement to combat it? Give reasons for your answer and include any relevant examples from your own knowledge or experience.
---
Air pollution is a big problem in many countries today. It affects people’s health and damages the environment. There are several reasons why this happens, and there are also some things we can do to fix it.
One main reason for dirty air is cars. In big cities, millions of vehicles are used every day. When cars burn petrol or diesel, they release harmful gases like carbon monoxide. Another reason is factories. Many industrial plants produce smoke and chemical waste that goes straight into the atmosphere. This makes the air quality very poor, especially in developing nations where rules are weak.
To solve this, the government should make better laws. For example, they can force companies to install filters on their chimneys. They should also encourage people to use buses or trains instead of driving. If public transport is cheaper and faster, people will use it more. Individuals can help by walking or cycling to work. Also, planting more trees in cities can absorb some pollution.
In conclusion, cars and factories cause most air pollution. Governments must create strict regulations and improve public transport. People should also change their habits. If we work together, air quality will improve in the future.
(Word count: 192 — Note: This falls short of the 250-word minimum, which automatically caps the score at Band 5-6 for Task Response.)
Band 6.0 Scoring Breakdown: • Task Response: Addresses both causes and solutions but lacks development. Word count under 250 limits score. Ideas are relevant but overly simplistic. • Coherence & Cohesion: Basic paragraphing and simple linking words ("One main reason," "In conclusion"). Transitions feel mechanical. • Lexical Resource: Repetitive vocabulary ("dirty air," "big problem," "fix it"). Limited academic range. • Grammatical Range & Accuracy: Mix of simple and compound sentences. Occasional errors in article usage and prepositions, but meaning remains clear.
---
Air pollution has become a severe environmental crisis that threatens public health and ecological balance across urban centres worldwide. This essay will outline the primary drivers of atmospheric contamination and propose viable measures to mitigate its impact.
The foremost contributor to deteriorating air quality is the proliferation of private motor vehicles. Internal combustion engines emit substantial quantities of nitrogen oxides and particulate matter, which accumulate in densely populated areas. Additionally, unregulated industrial activities play a significant role. Manufacturing facilities, particularly those relying on fossil fuels, discharge toxic by-products into the atmosphere without adequate filtration. In rapidly industrialising regions, lax enforcement exacerbates the issue, leading to hazardous smog events that disrupt daily life.
Addressing this challenge requires coordinated policy interventions and behavioural shifts. Governments must invest heavily in sustainable public infrastructure, such as electric bus networks and expanded metro systems, to reduce reliance on private cars. Implementing congestion charges in city centres can further discourage unnecessary driving. On an individual level, citizens can adopt low-emission commuting habits, such as carpooling or cycling. Furthermore, authorities should enforce stricter emission standards for factories and impose substantial fines on non-compliant enterprises to ensure accountability.
In summary, vehicular emissions and industrial waste are the principal causes of air pollution. By upgrading public transit, enforcing environmental regulations, and promoting eco-friendly lifestyles, societies can achieve cleaner air. These strategies, if implemented consistently, will yield long-term environmental benefits.
(Word count: 268)
Band 7.0 Scoring Breakdown: • Task Response: Fully addresses prompt with clear position. Solutions are practical and well-explained. Minor repetition in conclusion. • Coherence & Cohesion: Logical progression with clear topic sentences. Uses cohesive devices effectively, though some transitions are formulaic. • Lexical Resource: Good range of topic-specific vocabulary ("deteriorating air quality," "proliferation," "congestion charges"). Occasional awkward collocations. • Grammatical Range & Accuracy: Frequent complex sentences with mostly accurate control. Minor errors in article usage and prepositional phrasing do not impede readability.
---
The deterioration of urban air quality represents a critical public health and environmental emergency. While the roots of this crisis are multifaceted, they primarily stem from fossil fuel dependency and inadequate regulatory oversight. This essay will examine these underlying factors and advocate for systemic policy reforms alongside behavioural adaptation.
The most significant catalyst for atmospheric pollution remains the widespread reliance on combustion-engine transportation. Daily commutes in metropolitan hubs generate unprecedented volumes of nitrogen dioxide and fine particulate matter, directly correlating with respiratory ailments. Compounding this is the industrial sector’s continued dependence on coal and heavy oil. Many manufacturing plants operate with outdated emission control technologies, releasing sulphur compounds and volatile organic compounds into the lower atmosphere. In emerging economies, rapid urbanisation outpaces environmental legislation, creating a regulatory vacuum that permits unchecked pollution.
Mitigating this issue demands a dual approach combining legislative enforcement and infrastructural transformation. Municipal authorities must prioritise the electrification of public transit fleets and subsidise zero-emission vehicles through targeted tax incentives. Simultaneously, governments should implement real-time air quality monitoring networks linked to automated emission trading schemes, compelling polluters to internalise environmental costs. At the community level, promoting telecommuting and incentivising green building certifications can substantially reduce localized carbon footprints. When regulatory frameworks align with technological innovation, systemic change becomes both feasible and scalable.
Ultimately, air pollution is not an inevitable by-product of modernity but a manageable consequence of policy inertia. By transitioning toward sustainable mobility, enforcing stringent industrial standards, and leveraging market-based environmental mechanisms, nations can restore atmospheric integrity. Collective action, underpinned by scientific governance, remains the only viable pathway forward.
(Word count: 282)
Band 8.0 Scoring Breakdown: • Task Response: Fully developed, nuanced analysis. Solutions are highly specific and logically linked to causes. Demonstrates critical thinking. • Coherence & Cohesion: Seamless progression. Sophisticated referencing and paragraph unity. Cohesive devices used naturally without over-reliance. • Lexical Resource: Precise, academic vocabulary with natural collocation patterns. Rare minor inaccuracies in highly technical phrasing. • Grammatical Range & Accuracy: Wide variety of complex structures (conditional, passive, relative clauses) with consistent accuracy. Punctuation supports meaning.
---
Air pollution constitutes one of the most urgent anthropogenic threats of the twenty-first century, compromising respiratory health, degrading ecosystems, and accelerating climatic instability. This essay identifies vehicular emissions and unregulated industrial output as the principal drivers of atmospheric degradation, and argues that a synergistic combination of legislative reform, infrastructural modernisation, and behavioural adaptation offers the most effective remediation pathway.
The primary catalyst for declining air quality remains the global dependence on internal combustion engines. Urban transport networks generate substantial concentrations of nitrogen oxides and PM2.5 particulates, which penetrate pulmonary tissue and trigger chronic respiratory conditions. Concurrently, heavy industry continues to operate with insufficient emission controls, particularly in jurisdictions where economic growth supersedes environmental compliance. Manufacturing facilities frequently discharge sulphur dioxide and volatile organic compounds, which undergo photochemical reactions to form ground-level ozone. In developing regions, inadequate waste incineration protocols further exacerbate atmospheric toxicity, creating a compounding public health crisis.
Addressing this multidimensional challenge necessitates a calibrated policy architecture rather than isolated initiatives. Governments must mandate the phase-out of fossil-fuel vehicles by legislating binding electrification targets, while simultaneously expanding high-capacity, renewable-powered public transit systems. Implementing dynamic urban pricing mechanisms, such as congestion-based tolling and low-emission zones, can immediately disincentivise private car dependency in densely populated corridors. Industrial accountability requires the integration of continuous emission monitoring systems paired with cap-and-trade frameworks that impose financial penalties on non-compliant entities. Complementing these top-down measures, municipalities should institutionalise telework policies and promote active transport infrastructure, enabling citizens to adopt low-carbon commuting patterns organically.
In essence, atmospheric contamination stems from systemic reliance on polluting technologies and fragmented regulatory enforcement. By aligning legislative mandates with infrastructural investment and market-driven accountability mechanisms, policymakers can engineer a sustainable transition. Only through coordinated, evidence-based intervention can urban environments achieve lasting air quality restoration.
(Word count: 298)
Band 9.0 Scoring Breakdown: • Task Response: Fully satisfies all requirements with sophisticated, fully extended ideas. Position is consistently maintained and deeply analytical. • Coherence & Cohesion: Masterful paragraph management. Logical sequencing with seamless referencing. Cohesive devices used precisely to enhance argumentative flow. • Lexical Resource: Wide-ranging, precise vocabulary used naturally and accurately. Topic-specific terminology deployed with native-like collocation control. • Grammatical Range & Accuracy: Full flexibility and accuracy across complex structures. Punctuation, syntax, and clause management are flawless.
---
Collocation: anthropogenic emissions, anthropogenic climate change
Collocation: fine particulate matter, elevated particulate levels
Collocation: internal combustion, phase out combustion engines
Collocation: NOx emissions, reduce nitrogen oxide output
Collocation: form ground-level ozone via photochemical reactions
Collocation: stringent emission controls, upgrade industrial emission systems
Collocation: implement cap-and-trade, expand carbon trading schemes
Collocation: dynamic congestion pricing, introduce urban toll zones
Collocation: designate low-emission corridors, enforce LEZ standards
Collocation: institutionalise telework policies, promote flexible work arrangements
Collocation: create a regulatory void, exploit legislative gaps
Collocation: restore atmospheric quality, maintain ecological balance
Collocation: reduce localized carbon footprints, offset individual emissions
Collocation: fund transit modernisation, prioritise sustainable infrastructure
Collocation: adopt a synergistic approach, combine policy with technology
---
---
Get your own response scored by AI on English AIdol. Upload your essay and receive a detailed TR/CC/LR/GRA breakdown with band-specific feedback in under 60 seconds.
What word count is required for a high band in IELTS Writing Task 2? You must write at least 250 words. Submissions under 250 are penalised in Task Response, typically capping the overall band at 5.5 or 6.0 regardless of language quality.
How many causes and solutions should I include? Two well-developed causes and two corresponding solutions are optimal. Quality of explanation and coherence outweigh quantity. Depth of analysis is prioritised by Cambridge examiners.
Can I use first-person pronouns like "I" or "we"? Yes, but sparingly. Use them only in the introduction to state your position or in the conclusion to summarise. Avoid personal anecdotes in body paragraphs.
Is it acceptable to focus only on one side of the prompt? No. Problem-solution essays require balanced coverage of both causes and remedial measures. Focusing exclusively on one element results in a Task Response penalty.
How does Cambridge score vocabulary in environmental essays? Examiners assess precision, range, and natural collocation. Topic-specific terminology (e.g., "particulate matter," "cap-and-trade") scores higher than generic terms when used accurately.
Should I include statistics or specific country examples? Not required, but plausible examples (e.g., "London’s ULEZ policy," "China’s coal reduction targets") strengthen Task Response. Fabricated data is penalised if detected as unrealistic.