Water Pollution and Its Effects

This video covers water pollution, its types, sources, and global impact. It explains how water pollution affects ecosystems and human health, and describes methods to measure pollution levels, such as biochemical oxygen demand and biological indicators. The video also details eutrophication, its causes, and effects, and outlines management strategies to reduce pollution, including altering human activities, regulating pollution, and restoring habitats.

What is the estimated number of people who die daily due to water pollution?

• 5,000

• 20,000

• 14,000

• 10,000

Which of the following is a non-point source of water pollution?

• Agricultural runoff

• Sewage pipe

• Oil spill

• Factory discharge

Which disease is commonly associated with untreated water?

• Influenza

• Tuberculosis

• Cholera

• Malaria

What does a high biochemical oxygen demand indicate about water quality?

• Presence of fish

• High levels of pollution

• High oxygen levels

• Low levels of pollution

Which organism is an indicator of low pollution levels in freshwater?

• Tube effects worm

• Bacteria

• Stonefly nymph

• Algae

What is eutrophication primarily caused by?

• Additional nutrients

• Increased sunlight

• Increased fish population

• Decreased water flow

Which of the following is a potential source of nutrients leading to eutrophication?

• Plastic waste

• Heavy metals

• Detergents

• Oil spills

What is a 'dead zone' in aquatic environments?

• Place with high plant growth

• Area with high fish population

• Region with no sunlight

• Zone with oxygen-deficient water

Which strategy is NOT part of managing water pollution?

• Regulating pollution

• Increasing pollution

• Restoring habitats

• Altering human activity

What is the final step in managing water pollution according to the video?

• Increasing fertilizer use

• Restoring the habitat

• Regulating pollution

• Altering human activity