Pollution: Types, Causes and Prevention: 20 flashcards
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1. What is pollution?
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Pollution is the entry of harmful substances into the environment, making air, water, or land unsafe for living organisms.
2. What are the four main types of pollution?
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Air pollution, water pollution, soil pollution, and noise pollution.
3. What is the main cause of pollution?
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Human activities such as vehicles, factories, plastic, garbage, and burning of fuel.
4. What causes air pollution?
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Harmful smokes, dust, and gases mixing with the air, mainly from vehicles, factories, and burning of coal, wood, and garbage.
5. Name three ways to reduce air pollution.
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Plant more trees, use public transport or walk/cycle, and control harmful smoke from factories.
6. What is water pollution?
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Water pollution happens when harmful substances like garbage, plastic, sewage, and chemicals enter rivers and ponds, making water unsafe for drinking.
7. How can factories reduce water pollution?
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Factories should treat their waste before releasing it into water bodies.
8. What is soil pollution?
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Soil pollution occurs when harmful waste and chemicals like plastic bags, garbage, and waste make the soil dirty.
9. How does soil pollution affect our food?
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Harmful chemicals from polluted soil enter plants, and then enter the food we eat.
10. What is noise pollution?
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Noise pollution is caused by loud and unwanted sounds from vehicles, horns, loudspeakers, construction work, factories, and machines.
11. Name three effects of noise pollution.
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It can disturb sleep, make it difficult to study or concentrate, cause stress, and lead to hearing problems.
12. Why is noise pollution called an invisible pollutant?
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Because you cannot see it, unlike smoke or dirty water, but its effects on health are very real.
13. What is the source-pathway-victim chain in pollution?
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Source: a human activity releases a harmful substance. Pathway: the substance travels through air, water, or soil. Victim: living organisms encounter it and suffer harm.
14. Why is stopping pollution at the source the most effective approach?
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Because if the harmful substance is never released, it cannot travel through the environment or harm any living thing.
15. How does pollution harm people, animals, and nature?
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When air is polluted we breathe it, when water is polluted we drink it, when soil is polluted we eat food grown in it, and excessive noise causes stress and hearing loss.
16. What everyday choices can reduce pollution?
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Walking or cycling instead of driving, not throwing plastic into rivers, planting trees, and supporting factories that treat their waste.
17. Why is soil pollution especially dangerous for the food chain?
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Because soil is where food begins — harmful chemicals in soil enter plants, and then enter the food we eat.
18. What are the main sources of noise pollution?
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Vehicles, horns, loudspeakers, construction work, factories, and machines.
19. How does water pollution affect communities?
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It makes water unsafe for drinking, causes fish to die, harms crops, and leaves communities without access to clean drinking water.
20. What is the core message about pollution?
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Pollution is harmful to people, animals, and nature, and reducing it starts with everyday human choices.
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