Water pollution

The video discusses water pollution, its sources, and the impact on the environment. It covers international standards for drinking water, highlighting the importance of maintaining safe levels of fluoride, lead, sulphate, and nitrate. The causes of water pollution, including pathogens and organic waste, are explored, along with their effects on aquatic life. The video also explains eutrophication and how human activities accelerate this natural process, leading to environmental degradation.

What is a point source of water pollution?

• A source that is natural and not man-made

• A source that is spread over a large area

• A source that is easily noticeable and localized

• A source that is difficult to identify

What is the maximum safe concentration of fluoride in drinking water to avoid tooth and bone damage?

• 50 PPM

• 10 PPM

• 2 PPM

• 1 PPM

Which of the following is a potential health effect of consuming water with high lead content?

• Improved digestion

• Stronger bones

• Kidney damage

• Enhanced vision

What is the term for the amount of oxygen required by bacteria to decompose organic matter in water?

• Biochemical Oxygen Demand

• Oxygen Saturation Level

• Dissolved Oxygen Content

• Chemical Oxygen Demand

What happens when the dissolved oxygen level in water falls below 6 PPM?

• Algae growth is inhibited

• Aquatic plants thrive

• Fish and other aquatic animals may die

• Water becomes clearer

What is biomagnification?

• The increase in concentration of pollutants in organisms at higher levels of the food chain

• The process of water becoming more acidic

• The natural aging of water bodies

• The reduction of oxygen levels in water

What is eutrophication?

• The increase in water temperature

• The natural purification of water bodies

• The reduction of pollutants in water

• The process of water bodies becoming nutrient-rich and supporting excessive plant growth