science

List of countries by air pollution

List of countries by air pollution is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand List of countries by air pollution rather than just read about it. In short: The following list of countries by air pollution sorts the countries of the world according to their average measured concentration of particulate matter (PM2.5) in micrograms per cubic metre (μg/m3). The World Health Organization's recommended limit is 10 micrograms per cubic metre, although there are also various national guideline values, which are often much higher.

Key takeaways

List of countries by air pollution belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect List of countries by air pollution to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of List of countries by air pollution from memory before moving on to harder problems.

Reference excerpt

The following list of countries by air pollution sorts the countries of the world according to their average measured concentration of particulate matter (PM2.5) in micrograms per cubic metre (μg/m3). The World Health Organization's recommended limit is 10 micrograms per cubic metre, although there are also various national guideline values, which are often much higher. Air pollution is among the biggest health problems of modern industrial society and is responsible for more than 10 percent of all deaths worldwide (nearly 4.5 million premature deaths in 2019), according to The Lancet. Air pollution can affect nearly every organ and system of the body, negatively affecting nature and humans alike. Air pollution is a particularly big problem in emerging and developing countries, where global environmental standards often cannot be met. The data in this list refers only to outdoor air quality and not indoor air quality, which caused an additional two million premature deaths in 2019.

2022 list (UChicago AQLI 2022) All data are valid for the year 2022 and are taken from the Air Quality Life Index (AQLI) of the University of Chicago. In addition to particulate matter pollution, the modeled potential loss of life expectancy of the population due to particulate matter pollution is given.

List (2018−2023) All data are valid for the year 2018-2023 and are taken from the IQAir 2023 World Air Quality Ranking.

References

External links IQAir World Air Quality Ranking

Illustrations

Worked examples

Example 1 — a first encounter with List of countries by air pollution

Start with the simplest possible case. Write down what List of countries by air pollution claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to List of countries by air pollution before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about List of countries by air pollution ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of List of countries by air pollution

In research: List of countries by air pollution appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses List of countries by air pollution in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: List of countries by air pollution is common in secondary-school and first-year university syllabi. It links to neighbouring topics Air pollution, Environment-related lists by country, Particulates, so understanding it makes those chapters shorter.
In everyday life: Look for List of countries by air pollution outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “List of countries by air pollution” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study List of countries by air pollution in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what List of countries by air pollution means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain List of countries by air pollution out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is List of countries by air pollution in simple terms?

Why does List of countries by air pollution matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study List of countries by air pollution?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on List of countries by air pollution.