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Revision Notes
Triple Planetary Crisis — Revision Notes
ICSE · Class 9 · Environmental Science
Triple Planetary Crisis revision notes for ICSE Class 9 Environmental Science: 4 topics in quick points. Includes Triple Planetary Crisis: Core Idea.
58 questions40 flashcards5 concepts
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Key Topics to Revise
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1. Triple Planetary Crisis: Core Idea
- Triple Planetary Crisis refers to three interconnected global environmental challenges: climate change, biodiversity loss, and environmental pollution.
- UNEP describes the Triple Planetary Crisis as one of the most pressing challenges of our time.
- These three problems are closely linked and together threaten the Earth's life-support systems.
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2. Environmental Pollution
- Environmental pollution is the undesirable change in the physical, chemical, or biological characteristics of the environment caused by pollutants.
- Pollutants may be solid, liquid, or gaseous.
- Main human causes include industrialisation, urbanisation, burning of fossil fuels, deforestation, and excessive use of plastics and chemicals.
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3. Air Pollution and AQI
- Air pollution is the contamination of air by harmful substances that affect living organisms and the environment.
- Main sources include burning of fossil fuels, vehicle emissions, industrial activities, construction work, and burning of waste.
- Major air pollutants are particulate matter, sulphur dioxide, nitrogen oxides, carbon monoxide, and ground-level ozone.
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4. Water Pollution
- Water pollution is the contamination of water bodies such as rivers, lakes, oceans, and groundwater by harmful substances.
- The Great Pacific Garbage Patch is estimated to contain roughly 79,000 metric tons of debris, and 99.9% of it is plastic.
- Domestic sewage, industrial effluents, urban runoff, mining activities, and thermal pollution are major water pollutants.
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Full NotesKey Concepts
The Triple Planetary Crisis isEnvironmental pollution is the undesirable changeAir pollution is caused by harmfulWater pollution is the contaminationEutrophication happens when water bodies become
Frequently Asked Questions
What are the important topics in Triple Planetary Crisis for ICSE Class 9 Environmental Science?
Key topics in Triple Planetary Crisis include Triple Planetary Crisis: Core Idea, Environmental Pollution, Air Pollution and AQI, Water Pollution. Study these first, then practise questions on each for Class 9 exams.
How should I revise Triple Planetary Crisis for Class 9 exams?
Learn the core ideas first, then work through the 58 practice questions on Triple Planetary Crisis. Revise definitions regularly and use flashcards for quick recall before the exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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