CBSE Class 8 Science – Pollution of Air and Water

CBSE Class 8 Science – Pollution of Air and Water

Study Materials

8th

Science (EVS)

Pollution of Air and Water

Chapter Overview

This chapter discusses the pollution of air and water, its causes, harmful effects, and preventive measures. It explains how human activities contribute to environmental pollution, leading to health issues and ecological imbalances. The chapter also emphasizes the importance of conservation and sustainable practices to protect natural resources.

Important Keywords

  • Pollution: The presence of harmful substances in the environment that negatively affect living organisms.
  • Air Pollution: The contamination of the atmosphere by harmful gases, particulate matter, and chemicals.
  • Water Pollution: The contamination of water bodies by industrial waste, sewage, chemicals, and other pollutants.
  • Greenhouse Effect: The trapping of heat in the Earth's atmosphere due to gases like carbon dioxide and methane.
  • Acid Rain: Rainwater that contains acidic pollutants from industrial emissions.
  • Global Warming: The rise in Earth's average temperature due to excessive greenhouse gases.
  • Eutrophication: The excessive growth of algae in water bodies due to the accumulation of nutrients from fertilizers and sewage.
  • Biodegradable Waste: Waste materials that can decompose naturally over time.
  • Non-Biodegradable Waste: Waste materials that do not break down naturally and harm the environment.

Detailed Notes

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Important Facts

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Comparison Table

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Quick Revision

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Real Life Connection

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Frequently Asked Questions (FAQs)

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Learning Objectives

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