Environmental Impact of Pollution

The video discusses how the growing human population has led to increased pollution, affecting both air and water systems. It highlights the impact of untreated sewage, nitrates, and phosphates from fertilizers on water bodies, leading to eutrophication. This process causes rapid algae growth, blocking sunlight and depleting oxygen, resulting in the death of aquatic plants and animals, and a loss of biodiversity.

What is one of the main causes of increased pollution due to human activities?

• Reduction in agricultural practices

• Decreased industrial activity

• Improved waste management

• Growing human population

Which of the following is a source of water pollution mentioned in the video?

• Solar panels

• Wind turbines

• Untreated sewage

• Electric cars

What agricultural practice contributes to water pollution?

• Drip irrigation

• Organic farming

• Fertiliser application

• Crop rotation

What is eutrophication primarily caused by?

• Excessive sunlight

• Nutrient runoff

• High oxygen levels

• Low water temperatures

What happens to algae during eutrophication?

• They become dormant

• They decrease in number

• They remain unchanged

• They grow rapidly

What is the term used to describe water with very low oxygen levels?

• Hyperoxic

• Hypoxic

• Anoxic

• Aerobic

What is a major consequence of eutrophication on aquatic life?

• Loss of biodiversity

• Stable oxygen levels

• Enhanced plant growth

• Increased biodiversity

What happens to aquatic plants when light is blocked by algal blooms?

• They thrive

• They die

• They become more colorful

• They grow faster