Let me be blunt: this question terrifies a lot of IELTS writers. Not because plastic bags are complicated, but because students freeze up trying to sound "academic enough." They overwrite. They use words they don't actually control. Their essays end up confused and scattered.
Here's what you actually need to know. The plastic bag question is a classic Problem Solution essay format. The IELTS examiner isn't testing whether you care about the environment. They're testing whether you can identify a problem, propose logical solutions, and structure your argument so clearly that a reader who knows nothing about you understands every word.
Let's break down exactly how to write a Band 7+ response to this common IELTS essay topic.
Here's where most writers mess up: they treat "Should plastic bags be banned?" as a yes/no question. It isn't.
Look at the actual exam instruction: "Discuss the problems caused by plastic bag use and suggest some solutions to this problem." See the difference? You're not just saying "Yes, ban them" or "No, don't." You're identifying specific harms and then proposing realistic fixes.
Most Band 5 essays jump straight to solutions without properly establishing the problem. Band 6 essays identify problems but forget to link solutions back to those specific issues. Band 7+ essays do both systematically, with clear cause and effect.
Weak approach: "Plastic bags are bad. We should use paper bags instead. This will help the environment. Many countries have banned them."
Strong approach: "Plastic bags take up to 1000 years to decompose, causing long-term soil and ocean contamination. One solution is to introduce a levy on single-use bags, which has proven effective in reducing consumption by up to 80% in countries like Ireland."
Notice the difference? The strong version shows cause (slow decomposition equals long-term damage) and connects the solution directly to that cause (a levy reduces consumption, which reduces the contamination problem). This is Task Response, one of the four criteria the examiner uses to score your IELTS writing (out of 9 bands).
You have roughly 40 minutes for Task 1 and Task 2 combined. Most students spend 25-30 minutes on Task 2 (the essay). You can't afford to ramble.
Here's the skeleton:
Total target: 250-280 words. Why this range? It's enough to show range in vocabulary and grammar (Lexical Resource and Grammatical Range & Accuracy), but not so much that you're repeating yourself or padding with fluff.
Your intro has one job: introduce the problem and signal your structure. Not to impress anyone.
Good: "Single-use plastic bags have become a significant environmental problem due to their non-biodegradable nature and widespread use. This essay will examine the main issues caused by plastic bag consumption and explore practical solutions that governments and consumers can implement."
Why does this work? It names the problem ("single-use plastic bags"), specifies why it matters ("non-biodegradable"), and previews your essay structure ("examine the main issues" and "explore practical solutions"). You've done this in 43 words, leaving you room for substance in the body.
Weak: "Plastic bags are a big problem in the world today. They cause pollution. We need to do something about it. I will talk about solutions in this essay."
This is vague. "Big problem," "pollution," "something"—the examiner has no sense of your vocabulary range or your understanding of the issue. Also, avoid "I will" and "this essay." The Band Descriptors reward writers who sound confident and authoritative, not conversational.
Band 6 writers list problems. Band 7+ writers explain them and show consequences.
You don't have room for three separate problems. Pick one or two big ones and develop them properly.
Good (developed problem): "A primary problem is the persistence of plastic bags in landfills and oceans. Because plastic takes centuries to decompose, bags fragment into microplastics that enter the food chain. Marine animals ingest these particles, leading to illness and death. Furthermore, microplastics in soil reduce crop fertility, threatening food security in developing nations."
Weak (listed problem): "Plastic bags cause environmental damage. They pollute the ocean. They hurt animals. They also hurt plants. This is a serious problem."
The good version explains the chain of harm: bags persist, break into microplastics, enter the food chain, cause illness, affect soil fertility, threaten food security. Each sentence builds on the last. The weak version just throws problems at you with no connection.
Tip: Use linking words that show cause and consequence: "because," "as a result," "consequently," "this leads to," "owing to." These signal you understand relationships between ideas (Coherence & Cohesion).
Don't invent solutions. Use ones that exist and have data behind them.
Here are solutions that appear in real IELTS essays because they're proven:
Pick two solutions maximum. Develop each one in 2-3 sentences with reasoning.
Good (solution with reasoning): "Governments should implement a levy on single-use plastic bags, similar to policies adopted in Ireland and the UK. Evidence shows this approach reduces consumption by 80% or more, shifting consumer behavior without requiring a complete ban. The revenue generated can fund waste management infrastructure in developing countries, addressing both the supply and disposal sides of the problem."
Weak (solution without reasoning): "We should ban plastic bags. People should use paper bags or reusable bags instead. This will help the environment because they are better."
The good version names a specific policy, provides evidence of effectiveness, and explains how it addresses the root problem. The weak version offers a generic fix with zero explanation.
You don't need fancy words. You need precise, controlled words.
Here are three mistakes that drop you from Band 7 to Band 6.
1. Subject-verb disagreement with statistics.
Wrong: "Eighty percent of plastic bags is not recycled."
Right: "Eighty percent of plastic bags are not recycled." (Percentage refers to bags, plural.)
2. Using passive voice too much, which kills clarity.
Weak: "It is believed that measures should be taken by governments to reduce the use of plastic bags through the implementation of levies."
Better: "Governments should reduce plastic bag use by implementing levies."
You need some passive voice to sound academic. But Band 7+ essays balance passive and active voice. Overusing passive makes you sound robotic and wastes words.
3. Using opinion verbs incorrectly.
Wrong: "In my opinion, I think that a levy should be imposed."
Right: "A levy would likely reduce plastic bag consumption effectively."
Problem solution essays don't require you to use "I." In fact, avoiding it makes you sound more authoritative. Use "it can be argued that," "evidence suggests that," or simply state the point directly.
Tip: Read your essay out loud after writing. If you hear yourself repeating words (plastic, bags, problem, use) more than twice per paragraph, replace some with pronouns or synonyms like "this issue," "their consumption," "the practice."
Here's a complete essay you can use as a template. It's 268 words, hits all the requirements, and shows the structure in action.
Full Essay:
Single-use plastic bags have become a significant environmental problem due to their non-biodegradable nature and widespread consumption. This essay will examine the main issues caused by plastic bag usage and explore practical solutions that governments and consumers can implement.
The primary problem is the persistence of plastic bags in natural environments. Because plastic takes up to 1000 years to decompose, bags accumulate in landfills and oceans, fragmenting into microplastics. These particles enter the food chain, causing illness in marine animals and potentially affecting human health through seafood consumption. Additionally, microplastics in soil reduce agricultural fertility, threatening food security in developing regions. This dual impact on ecosystems and food production makes plastic bags a critical issue.
Two solutions can effectively address this problem. First, governments should implement a levy on single-use bags, as successfully demonstrated in Ireland and the UK. Evidence shows this approach reduces consumption by 80% or more without requiring outright bans, shifting consumer behavior through economic incentive. Second, promoting mandatory use of certified biodegradable alternatives would protect the environment while preserving consumer convenience. Companies could transition packaging gradually, reducing costs.
In conclusion, while plastic bags pose serious environmental and health risks, targeted policy interventions can significantly reduce their impact. Combining economic measures with sustainable alternatives offers a realistic path forward for both developed and developing nations.
Count the strengths here:
After you write your essay, spend 2-3 minutes on this checklist. It catches 80% of the errors that drop you from Band 7 to Band 6.
Spend 90 seconds on this. Seriously. Most low scores happen because writers skip proofreading entirely.
The problem solution structure you've learned here works for many IELTS environmental essay topics. If you're preparing for other essay types, understanding how technology does more harm than good uses a different structure (argument essay, not problem solution) can help you distinguish between the formats. Similarly, learning how to approach whether governments should spend more on healthcare as a discussion essay teaches you how some prompts ask you to weigh opposing views rather than propose fixes.
The key is practicing multiple essay types so you can recognize what the examiner is asking for in the first 30 seconds. That recognition saves you from writing the wrong structure entirely.
Write your plastic bags essay, then use our IELTS essay checker to get a band score estimate and line-by-line feedback on Task Response, Coherence, Vocabulary, and Grammar.
Check My Essay FreeIf you're consistently getting Band 6 feedback, the problem is usually one of these three things:
1. Your solutions don't match your problems. You describe ocean pollution but then propose education campaigns without explaining how education stops pollution. The examiner sees a disconnect.
2. You repeat ideas instead of developing them. You write "plastic bags are harmful" three times in different ways. One developed paragraph beats three weak ones.
3. You use simple vocabulary because you're afraid of making mistakes. Band 7 requires you to use more advanced words accurately. Use "accumulate" instead of "gather." Use "levy" instead of "fee." Use "fragment" instead of "break." But only if you know what they mean.
If you're stuck in the 6 to 6.5 range, our guide on exactly what changes to make to move from Band 6 to higher scores breaks down the specific gaps the examiner looks for. It covers all four criteria, not just one.
Writing one practice essay won't get you there. You need repetition.
Set a timer for 40 minutes. Write about plastic bags using this IELTS model answer as reference. Spend 5 minutes checking your work using the checklist above. Then do it again with a different environmental topic. The repetition builds fluency so you stop second-guessing every sentence.
If you're short on essay topics, our collection of problem solution and discussion essays across different topics gives you templates for structure without handing you the answer. Study the structure, not the content. The structure transfers to any IELTS writing task.